All tools
400 tools, searchable and organized by category. Each one works standalone, and many combine with each other.
12 Days of Christmas Price Index Calculator
Personalize the '12 Days of Christmas' price tag: adjust how many of each gift you'd actually buy, using PNC's official 2025 Christmas Price Index per-gift prices (the 2026 index isn't published yet).
2027 401(k) & IRA Contribution Limits Calculator (Projected)
Free 2027 401(k) & IRA contribution limit calculator using the latest projected IRS figures (Milliman's near-final forecast) — pick your age band and see your projected 2027 limit next to the confirmed 2026 amount. Clearly labeled as unofficial until the IRS announces official 2027 numbers (expected Oct-Nov 2026).
2027 ACA Health Insurance Premium Subsidy Calculator
Estimate your 2027 ACA premium tax credit by entering your income, household size and your plan's benchmark premium. Enhanced subsidies expired at the end of 2025 and have not been extended — the original 400% federal poverty level income cap applies again for 2027 coverage, meaning no subsidy at all above that line.
2027 Federal Tax Brackets & Standard Deduction Calculator (Projected)
Free 2027 federal tax bracket calculator (projected) — see next year's estimated brackets and standard deduction next to this year's confirmed numbers. Built with a transparent formula (confirmed 2026 brackets x Bloomberg Tax's 3.2% projected inflation adjustment, rounded to the nearest $50) that matches the one bracket figure Bloomberg Tax has actually published.
2027 HSA & FSA Contribution Limit Calculator
See your exact 2027 HSA or FSA contribution limit, with HSA figures marked CONFIRMED (IRS Rev. Proc. 2026-24) and FSA figures marked PROJECTED, since the IRS hasn't announced official FSA numbers yet. No guessing which number to trust.
2027 Social Security COLA Calculator
Free 2027 Social Security COLA calculator — enter your current benefit and compare TSCL's 3.5% and AARP's 3.6% pre-announcement estimates side by side, or enter your own percentage. Official SSA figure announces October 14, 2026.
2027 State Minimum Wage Calculator
Free 2027 state minimum wage calculator — see confirmed 2027 rates where already announced, or an honest "pending" status for inflation-indexed states awaiting their official fall 2026 announcement. See the full-time annual pay impact either way.
2048
Swipe or use arrow keys to slide tiles — matching numbers merge into their sum. Reach 2048 to win.
401(k) Per-Paycheck Max-Out Calculator (2026)
See how much to contribute from each remaining paycheck, in dollars and as a percent of pay, to reach your 2026 401(k) limit by December 31, with catch-up amounts for ages 50+ and 60 to 63.
401K Calculator
Free 401(k) calculator with employer match modeling and a live check against the actual 2026 IRS contribution limits — including age 50+ catch-up ($8,000) and the age 60-63 super catch-up ($11,250).
529 Plan Super-Funding (5-Year Election) Calculator
Enter a lump-sum 529 contribution to see exactly how the 5-year gift-tax election spreads it out against the 2026 limits -- $19,000/$95,000 for an individual, $38,000/$190,000 for a married couple -- with no signup or downloaded report required.
ADHD Medication Cost & Coupon Savings Calculator
See the real dollar gap between paying full retail for ADHD medication and using a manufacturer or pharmacy discount program -- no specific coupon brand pushed, just the honest cost comparison during an ongoing stimulant shortage.
Advent Calendar Value Checker
Free advent calendar value calculator — enter what you paid, how many doors, and the retail value of what's inside, and see the payout ratio for any calendar (beauty, food, toy, or otherwise), not just brand-published claims.
Age Calculator
Free age calculator that shows your exact age in years, months, and days, plus days until your next birthday — using real calendar-based math, not a 30-day-average approximation.
AI Coding Assistant Cost Comparison
Check off the AI coding assistants you subscribe to (Cursor, GitHub Copilot, Devin Desktop/Windsurf) and pick each plan tier to see your monthly total, using October 2026 individual-developer pricing. Distinct from our AI Token Cost Calculator (raw API pricing) and AI Subscription vs API Cost Calculator (general AI chat subscriptions) — this is specifically for coding-assistant subscriptions.
AI Runway Calculator
Enter your AI API budget and usage pattern to see exactly how many days it will last — not just a total cost, across 9 models from OpenAI, Anthropic, and Google.
AI Subscription vs API Cost Calculator
Free calculator comparing a flat AI subscription ($20/mo ChatGPT Plus, Claude Pro, or Gemini AI Pro) against pay-as-you-go API cost for your actual usage — pick any of 12 models, see your break-even point.
AI Token Cost Calculator
Estimate and compare API costs across 12 current AI models — paste a prompt or enter token counts directly, no sign-up.
AI Video Generation Cost Calculator
Free AI video generation cost calculator for Veo 3.1, Kling 3.0, and Runway Gen-4.5 — pick a model tier, enter your clip length and count, and see the total cost with the exact per-second rate and official source shown right in the result (not buried in a blog post).
Amazon Prime Big Deal Days 2026 Deal Value Checker
Free deal value checker built for Amazon Prime Big Deal Days (held October 6-7, 2026) and usable for any later sale — enter the listed price, the deal price, and what you've actually seen it for recently, and see whether the discount is real or just measured against an inflated 'original' price. No account, no browser extension, no product tracking setup.
Amortization Calculator
Free amortization schedule calculator with a one-click CSV download, extra-payment payoff acceleration, and a monthly/yearly view toggle — we checked two popular amortization calculators directly and neither offers a direct CSV export from the tool itself (one has a vague 'save' icon, the other pushes you to a separate Excel template page).
APR Calculator
Free APR calculator that spreads your fees and points across the loan term to reveal the true annualized borrowing cost — the number that actually lets you compare loan offers fairly.
ATS Resume Keyword Matcher
Free ATS resume keyword checker — paste your resume and a job description to see the exact keyword overlap, with no account, no monthly scan limit, and nothing uploaded to a server.
Auto Lease Calculator
Free auto lease calculator that converts your APR to a money factor automatically and breaks out the depreciation fee and finance fee separately — we checked a widely used online lease calculator directly: it explains the APR-to-money-factor formula in text but has no actual conversion input, and only shows aggregate totals, not the fee breakdown.
Auto Loan Calculator
Free auto loan calculator with trade-in, sales tax, and fees built into the amount financed — plus a downloadable amortization schedule. We checked a widely used online auto loan calculator directly: it has the same inputs but no CSV export of the schedule at all.
Auto Loan Interest Deduction Calculator
Free Auto Loan Interest Deduction calculator for the OBBBA 2025-2028 federal deduction — checks new/US-assembled/loan-date eligibility, shows your MAGI phase-out, and estimated federal tax savings.
Average & Dominant Color Extractor
Upload an image and get both its average color (all pixels blended together) and its dominant color palette (the most common color clusters) side by side — with HEX, RGB, and HSL for each, one click to copy.
Average Return Calculator
Free average annual return calculator that shows CAGR right alongside it — a well-documented pitfall in investing is that arithmetic average return is always higher than (and can meaningfully overstate) what an investment actually compounded to, especially for volatile years. This tool shows both so the gap is visible instead of hidden.
Baby Name Generator (2026 Trends)
Generate baby name ideas filtered by gender (boy, girl, or gender-neutral) and 2026 trend style — classic, nature-inspired, light & fire-themed, or literary. Each combination draws from a pool of 10 names to keep results varied on repeat clicks.
BAC Calculator
Free BAC calculator using the Widmark formula — a clearly-labeled educational estimate, not a tool for deciding whether it's safe to drive. If you've been drinking, the only safe choice is not to drive, regardless of what any calculator shows.
Background Pattern Generator
Build a pure-CSS background pattern (dots, grid, lines, checks, diamonds) with an opacity slider on both the pattern and background color — checked directly, a popular pattern generator has no opacity control at all, so a subtle texture means hand-editing the CSS into rgba(). A sample-text overlay toggle also shows the pattern behind real headline copy so you can catch readability problems before shipping it.
Band Name Generator
Generate band name ideas by genre (rock, metal, pop, acoustic, electronic) instead of one genre-blind pile, grouped into one-word, two-word combo, and "The ___s" types.
Bandwidth Calculator
Calculate file transfer time from size and connection speed — with a realistic estimate (adjustable efficiency, default 80%) shown alongside the theoretical one, not just a theoretical number presented as if it were real.
Barcode Generator
Generate CODE128, EAN-13, or UPC-A barcodes and download as SVG — a vector format that stays scan-ready at any print size, unlike PNG-only generators whose bars blur and stop scanning once enlarged.
Base64 Encoder/Decoder
Encode text or files to Base64, or decode Base64 back to text or an image preview — both directions on one page, with an optional URL-safe variant.
Batch Image Processor
Resize and convert dozens of images at once, entirely in your browser — no upload, no account, no daily limit — then download them all as a zip or one by one.
bcrypt Hash Generator
Hash a password with bcrypt live, entirely in your browser, with an adjustable cost factor — plus a Verify tab to check a candidate password against an existing hash.
Betting Odds Converter
Free betting odds converter — enter American, decimal, or fractional odds and instantly see all three formats, implied probability, and payout on your stake, in one screen (no separate calculator needed).
Bionic Reading Converter
Convert any text into Bionic Reading format live — bolds the leading part of every word so your eyes fixate less, with rich-text copy that keeps the bold formatting when pasted elsewhere.
BIP39 Mnemonic Generator
Generate a 12–24 word BIP39 mnemonic and validate any phrase's checksum, in a page with no wallet-address derivation, no client-configuration clutter, and a warning that stays visible instead of buried in the fine print. Testing and learning only — not for real funds.
Black Friday / Cyber Monday 2026 Real Discount Checker
Free Black Friday and Cyber Monday 2026 (Nov 27 & Nov 30) real discount checker — a 2025 WalletHub survey found 36% of online items had no real savings off their pre-Black Friday price, with genuine discounts averaging 24%. Enter the listed price, deal price, and a recent price you've actually seen to check which kind of 'deal' you're looking at.
Block Stack
Move, rotate, and drop falling blocks to clear full rows before the stack reaches the top.
BMI Calculator
Calculate your Body Mass Index (BMI) from height and weight, and see where you fall on the standard weight range.
BMR Calculator
Free BMR calculator with a choice of three formulas — Mifflin-St Jeor, Harris-Benedict, and Katch-McArdle for people who know their body fat percentage — not just the one formula most calculators default to.
Body Fat Calculator
Free body fat calculator using the US Navy circumference method — with a plausibility check that flags results outside the physiologically typical range, instead of confidently showing a number that may be unreliable for your body shape.
Body Surface Area Calculator
Free body surface area calculator using the Mosteller formula — the version most commonly cited in clinical references for its simplicity and accuracy.
Body Type Calculator
Free body frame size calculator using an actual measurement (height-to-wrist ratio) instead of a self-reported body type quiz — small, medium, or large frame, based on bone structure.
Bond Calculator
Free bond calculator that works in both directions — price from yield, or yield to maturity from a price you'd actually pay. We checked a widely used online bond calculator directly: it only computes price given yield, not the reverse, even though 'what yield am I actually getting at this price?' is the more common real-world question.
Border Radius Generator
Free CSS border-radius generator with independent horizontal/vertical control on all 4 corners (elliptical corners) — several simpler generators we checked only support a single radius value per corner, no elliptical split. Also switches between px and % units, so you can make responsive shapes (like a true circle) that most fixed-px tools can't.
Box Shadow Generator
Free CSS box-shadow generator that starts from a real preset, not a blank canvas — every generator we checked (e.g. front-end-tools.com) makes you dial in x/y/blur/spread/color from zero every time. Pick Material elevation, Neumorphism, or Long shadow and adjust from there. Supports up to 3 layered shadows, each individually toggled on/off, with inset support.
Bra Size Calculator
Free bra size calculator using the traditional US band-and-cup method — enter your underbust and bust measurements to get an estimated size, with the formula clearly shown.
Braille Translator
Convert English text to Grade 1 (uncontracted) braille and back — exact, reversible, with proper capital and number signs.
BTU Calculator
Free BTU calculator for sizing a room air conditioner — based on the Energy Star sizing guide's square-footage table, adjusted for sun exposure, occupants, and kitchens.
Budget Calculator
Free 50/30/20 budget calculator — needs, wants, and savings targets from your income, with an optional comparison against what you're actually spending. We checked a widely used online budget calculator directly and it uses a different 8-category framework, not the widely-known 50/30/20 rule.
Budget Planner Template
Build a monthly budget with multiple income sources and expense categories, compare planned vs actual spending with auto-calculated totals and remaining balance, then print or save it as a PDF straight from your browser — no signup, no account, and nothing is ever uploaded to a server.
Bullying Incident Documentation Generator
A calm, judgment-free way to document a bullying incident -- date, what happened, witnesses, who you've already told, and what follow-up is needed -- into a clean record you can copy or print for the school. Nothing you type is saved or sent anywhere; it exists only in your browser.
Business Loan Calculator
Free business loan calculator that factors in an origination fee — a cost most generic loan calculators skip even though it's standard on most small business loans — plus a downloadable amortization schedule.
Business Name Generator
Generate business name ideas from a keyword, grouped by type (compound, metaphorical, acronym) instead of random word mashups — with a clear reminder that these are starting points, not a domain/trademark check.
Business Plan Template
Write a structured business plan in your browser with a guiding prompt for every section: executive summary, company, problem and solution, market, offer, marketing, operations, team and funding request. Add a three-year revenue, cost and profit table, then print or save the plan as a PDF. No signup, no paywall, nothing uploaded.
Caffeine Intake Calculator
Track today's caffeine from coffee, tea, energy drinks, and soda — checked against both the flat FDA limit and a more personalized, weight-based limit.
Calendar Template Generator
Pick a month and year to generate a clean, accurately-aligned printable monthly calendar grid — choose Sunday or Monday as the first day of the week, optionally add note lines to each day, then print or save it as a PDF straight from your browser. No signup, no watermark, nothing uploaded.
Calorie Calculator
Free calorie calculator that turns your maintenance calories (TDEE) into a daily target for losing, maintaining, or gaining weight, using the real ~7,700 calorie-per-kilogram-of-fat rule for the rate you choose.
Calories Burned Calculator
Free calories burned calculator using standard MET (metabolic equivalent) values across 12 common activities — from walking to weight training — based on your actual weight and duration.
Candy Match
Collect 15 red candies in 20 moves or fewer — swap adjacent candies to line up 3 or more of the same color.
Car Insurance Rate Increase Checker
Enter your current and renewal car insurance premiums to see your personal increase percentage -- and whether it's in line with, or far above, the 2026 national average.
Carbon Footprint Calculator
A quick, honest estimate of your annual carbon footprint from driving, electricity, and flights — using published emission factors, not a black box.
Case Converter
Convert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case, and PascalCase instantly — all in your browser.
Cash Back or Low Interest Calculator
Free calculator comparing a cash rebate at the standard loan rate versus a promotional low/0% APR without the rebate — shows the total cost of each option side by side so you know which dealer offer actually costs less.
Catch the Tools
Move the basket and catch as many tool icons as you can in 30 seconds — a quick, silly way to discover tools you haven't tried yet.
Checkbox Style Generator
Generate a custom-styled checkbox that hides the native input with opacity:0, not display:none — verified directly that display:none removes a checkbox from the keyboard tab order entirely (a .focus() call on it silently fails), while opacity:0 keeps it fully keyboard- and screen-reader-accessible. Includes :focus-visible and :indeterminate styling by default.
Chess Rating Performance Calculator
Enter your rating, your opponent's rating, the result, and your K-factor tier to see exactly how your chess rating changes -- using the standard Elo formula, not a vague estimate.
Child Tax Credit Calculator (2026)
Estimate your 2026 Child Tax Credit: the $2,200 per child, the reduction for high income, how much lowers your tax bill, and how much can come back as the refundable Additional Child Tax Credit.
Childcare Cost & Tax Credit Calculator
Free childcare cost calculator with the 2026 Child and Dependent Care Tax Credit (now up to 50%, raised from 35%) and the new $7,500 Dependent Care FSA limit — see which one saves more for your income and expenses, since you generally can't claim both on the same dollars.
chmod Calculator
Toggle read/write/execute for owner, group, and others — including setuid, setgid, and sticky bit from the start, not gated behind a separate "Pro" tool — and get a ready-to-copy chmod command instantly.
Christmas Lights Electricity Cost Calculator: LED vs Incandescent
Find out what your string lights cost to run this season and how much you would save with LED sets, using Department of Energy wattage figures and the latest U.S. average electricity price you can overwrite.
Christmas Tree Real vs Artificial Cost Calculator
Compare the cumulative cost of buying a real Christmas tree every year (ACTA's 2026 average: $80-$100) against a one-time artificial tree purchase ($85-$1,000+), and see the exact year the artificial tree starts saving you money. Sources disagree on a 'typical' artificial tree lifespan (6 to 10 years) — so instead of picking one, this tool lets you set your own planned years of use.
Clan Name Generator
Generate gaming clan names with a matching 3-4 letter clan tag shown right next to each name, instead of names alone — pick a tone (aggressive, fantasy, funny) and get 8 at once.
Clip Path Generator
Pick a preset shape (triangle, star, arrow, speech bubble, or circle/ellipse/inset) and edit every point or parameter with a plain number input instead of dragging a mouse — checked directly, a popular clip-path tool has no numeric input at all, no copy button, and no -webkit-clip-path prefix in its output. This one includes all three.
Code to Image Converter
Turn a code snippet into a syntax-highlighted window image — auto-sized to your code so there's no manual centering, and your code never touches the URL (unlike the tools it's compared to, where pasting code puts it straight into a query string or hash you can verify yourself).
Coin Dash
Switch lanes to grab coins and dodge trains — your score is coins collected, not distance run.
College Cost Calculator
Free college cost calculator projecting future tuition using real 2025-26 average costs and typical annual increase rates, plus an optional savings projection to see the exact gap between what you're saving and what you'll need.
Color Match
Tap to cycle your ball through 4 colors and match each falling gate's color before it reaches you — one wrong color and it's game over.
Color Mixer
Mix two colors two ways at once — plain RGB averaging, and OKLab, the color space CSS's own color-mix() actually defaults to — shown side by side with each result's chroma, so you can see exactly why RGB averaging looks muddier (mixing red and green in RGB gives a chroma of 0.126, about half of either source color).
Color Shade Generator
Generate a lighten/darken scale from any color two ways at once — traditional HSL, and perceptually uniform OKLCH — shown side by side, so you can actually see why HSL's brightness steps look wildly inconsistent from one hue to the next (yellow and blue at identical HSL lightness differ in real brightness by about 13x).
Color Unmixer
See a color you like and wonder what two colors would mix together to make it? Pick the target — no need to already know one of the ingredients, unlike similar reverse-mix calculators — and get two candidate colors, with a live preview proving they mix (in the same OKLab model as Color Mixer) back to exactly that color, not an approximation.
Columbus Day Mattress & Furniture Sale Real Discount Checker
Columbus Day 2026 (October 12) brings mattress and furniture sales, but some mattress-industry sale trackers classify it as a secondary-tier event with shallower average discounts than Memorial Day, Black Friday, or Presidents Day. Enter the listed price, the deal price, and what you've actually seen it for recently to see whether a Columbus Day discount is real or just a bigger number off an inflated 'original' price.
Commission Calculator
Free tiered commission calculator with a tier-by-tier breakdown table and a commission split (e.g. agent/broker) — we checked a widely used online tiered commission calculator directly and it supports progressive tiers but has no split feature and no breakdown table showing how much fell into each tier.
Company in 30 Seconds
Type a US stock ticker and instantly see revenue, net income, cash, operating income, and long-term debt from the company's latest annual SEC filing — plain numbers, not a dense spreadsheet.
Compound Interest Calculator
Free compound interest calculator with monthly contributions, a choice of compounding frequency, a year-by-year schedule, and CSV download — all in one tool. We checked a widely used online calculator named 'Compound Interest Calculator' directly: it only converts between compounding rates, and its own page tells you to use a separate 'Interest Calculator' for actual growth math.
Concrete Calculator
Free concrete calculator for slabs, footings, walls, and round post holes — get the cubic yards needed and, unlike most calculators, exactly how many 40/60/80 lb premix bags to buy.
Contrast Checker
Check text/background contrast against both WCAG 2.x (today's legal/practical standard) and APCA (its documented WCAG 3 successor) at once — because WCAG 2.x's formula is known to overstate contrast for darker color combinations (verified directly: gray #7d7d7d text on black passes WCAG AA at 5.10:1, but scores a weak APCA Lc of -33.3, well below what's needed for reliable body text).
Countdown Timer
A live countdown to any date and time — no ads, no account, and a link you can share that shows the exact same countdown.
Country vs Country (GDP)
Pick any two countries and instantly compare GDP — a plain-language "X times bigger" answer, not just a table of raw numbers to interpret yourself.
Creatine Dosage Calculator
Free creatine dosage calculator using ISSN (International Society of Sports Nutrition) guidelines — see your exact loading-phase and maintenance-phase doses by body weight, plus how much longer it takes to saturate your muscles if you skip loading.
Credit Card Rewards Points Value Calculator
Enter your points or miles balance, pick your program, and see the real dollar value -- using The Points Guy's current per-program valuations, not a guess.
Credit Freeze & Identity Theft Action Checklist
Data breach notices already topped 471 million in the first half of 2026, more than all of 2025 (297.5 million), according to Identity Theft Resource Center data. This is an educational checklist and a tracker for freezing your credit file at all three bureaus, with direct links to each bureau's own official freeze page -- it is not a form, and it never asks for your SSN, date of birth, or address.
Cron Expression Parser
Type a 5-field cron expression and get a plain-English description plus the next 10 run times in your browser's local timezone (shown explicitly) — not just 5, and not silently assuming server time.
CSS Minifier / Formatter
Minify or format CSS live, with an instant byte-size reduction percentage — /*! license */ comments always survive minification, and declaration order is never changed.
CSS Triangle Generator
Free CSS triangle/arrow generator with a full 0-360° rotation slider — we checked a popular competitor (10015.io) directly and it only offers 8 fixed preset directions with no arbitrary angle control. It also solves a limitation that competitor's own docs admit: a border-trick CSS triangle 'can't have box-shadow' because it's a 0x0 element — this tool uses filter: drop-shadow() instead, which follows the actual rendered triangle shape correctly.
CSV Doctor
Paste or upload a CSV and get a live health report — delimiter, column-count mismatches, exact duplicate rows, and possible encoding mismatches — with opt-in cleanup that never deletes data without your say-so.
CSV to XML to JSON Converter
Convert between CSV, XML, and JSON in any direction on one screen, instead of hopping between separate one-way tools — nested objects flatten to parent.child, arrays to field[0], fully documented.
Cubic Bezier Generator
Drag the curve or type exact numbers into 4 coordinate fields — checked directly, a popular cubic-bezier tool has zero number inputs anywhere, mouse-drag only. Includes 24 named easings.net presets (Sine/Quad/Cubic/Quart/Quint/Expo/Circ/Back) beyond the usual 5 basics, and a real card UI you can play to feel the motion instead of watching an abstract dot.
Currency Converter
Free currency converter using live European Central Bank exchange rates via the Frankfurter API — no API key, no sign-up, 20 major currencies supported.
D&D Name Generator
Generate D&D character names by race (Human, Elf, Dwarf, Orc, Halfling) and gender on one screen — switch races instantly instead of hunting through hundreds of separate generator pages.
Data Size Converter
Convert between bits, bytes, KB, MB, GB, and TB — with decimal (1000-based) and binary (1024-based, KiB/MiB/GiB) values shown side by side, so you can see exactly why your "500GB" drive shows up as 465 in your OS.
Date Calculator
Free date calculator with two modes: count the exact days between two dates, or add/subtract years, months, weeks, and days to find a resulting date.
Day of the Week Calculator
Free day-of-the-week calculator — enter any date, past or future, and instantly see which day of the week it falls (or fell) on, plus whether it's a weekday or weekend.
Debt Consolidation Calculator
Free debt consolidation calculator comparing a new consolidation loan against paying off your current debts with the avalanche strategy — we checked a widely used online debt consolidation calculator directly and it only compares consolidating against your current minimum-payment plan, never against the cheaper avalanche payoff order.
Debt Payoff Calculator
Free debt payoff calculator that runs both the avalanche and snowball strategies side by side on your actual debts — we checked a widely used online debt payoff calculator directly and it only implements avalanche, explaining in text (but never demonstrating with numbers) that snowball usually costs more.
Debt-to-Income Ratio Calculator
Free debt-to-income ratio calculator computing both front-end (housing only) and back-end (all debts) DTI, each shown with a color-coded bar against the conventional 28%/36% lender thresholds — so you see at a glance where you stand, not just a bare percentage.
Decimal Hours Converter
Convert hours and minutes to decimal hours for payroll — enter time as separate hour/minute fields (so you can't accidentally type "38.20" instead of 38.33), with optional FLSA-compliant rounding presets.
Density Calculator
Free density calculator that solves for density, mass, or volume from the other two — using the same ρ = m/V equation from either direction, so there's no separate "mass calculator" to hunt for.
Depreciation Calculator
Free depreciation calculator with straight-line, declining balance, and double-declining balance methods, a full year-by-year schedule, and one-click CSV download.
Depression Screening Self-Check (PHQ-9)
The standard 9-question PHQ-9 depression screening questionnaire, used by doctors worldwide -- answer honestly, see your score and what it typically means, and get the 988 Suicide & Crisis Lifeline number, always visible. This is a screening tool, not a diagnosis. Nothing you answer is saved or sent anywhere -- it runs entirely in your browser and disappears when you leave the page.
Dew Point Calculator
Free dew point calculator using the Magnus formula — enter temperature and relative humidity to see the dew point and a plain-language comfort level (dry to oppressive).
Dice Roller
Free online dice roller — roll any number of dice with any number of sides (not just standard d4/d6/d20), with a running roll history and no ads.
Discount Calculator
Free discount calculator that stacks multiple sequential discounts correctly (20% off then an extra 10% off is 28% total, not 30%) and adds sales tax on the final price — we checked a widely used online discount calculator directly and it only handles a single discount, explicitly pointing you elsewhere for stacking.
Domestic Violence Safety Plan Generator
A private, judgment-free way to organize a personal safety plan -- a safe place to go, a code word with people you trust, documents to have ready, emergency contacts, and a safe way to communicate. Nothing you type is saved or sent anywhere; everything stays in your browser and disappears when you leave the page. Always-visible Quick Exit button and the National Domestic Violence Hotline (1-800-799-7233) throughout.
Doodle Hop
Bounce automatically from platform to platform — steer left and right to keep climbing as high as you can before you fall.
Dot Maze
Eat every dot in the maze while dodging the two ghosts chasing you.
Down Payment Calculator
Free down payment calculator that estimates your actual monthly PMI cost when your down payment is under 20% — we checked a widely used online down payment calculator directly and it only warns that PMI will likely apply, without calculating what it actually costs.
DST Fall-Back Sleep Adjustment Planner
Free planner for the November 1, 2026 daylight saving time fall-back — enter your usual bedtime and get a 3-night gradual bedtime-shift schedule based on AASM guidance, instead of just a generic tip.
Early Decision/Action College Deadline Countdown
A live countdown to November 1 and November 15 -- the two most common Early Decision and Early Action deadlines -- with a plain-language explainer on binding ED versus non-binding EA.
Earthquake Near Me
Tap one button and instantly see the nearest recent earthquake — magnitude, distance, and how long ago — plus a list of other nearby quakes. Works even if you don't grant precise GPS access.
Electricity Cost Calculator
Free electricity cost calculator — enter a device's wattage, how long you run it, and your per-kWh rate to see exactly what it costs to run, per day and in total.
Email Signature Generator
Build a professional HTML email signature from your name, title, and contact details — no account, no watermark. Copy it as rich text and paste it straight into Gmail or Outlook.
Emoji Picker
Search emoji by keyword or browse by category, and copy any emoji with a single click — no separate Copy button, and your recently used emoji are remembered automatically.
Estate Planning Readiness Checklist
Answer four quick questions about your age, kids, property, and retirement accounts to get a personalized, plain-language checklist of which estate planning documents to prioritize -- no purchase, no account, no legal jargon.
Estate Tax Calculator
Free federal estate tax calculator using the 2026 exemption ($15M individual, $30M married with portability) and 40% top rate — shows exactly how much of a large estate is actually taxable.
EV Ownership Cost Calculator
Free EV vs. gas total cost of ownership calculator — built for 2026, after the federal $7,500 new-EV and $4,000 used-EV tax credits both ended October 1, 2025. Compares real energy costs and total ownership cost, since the credit is gone but fuel savings aren't.
Excuse Generator
A random, absurd excuse for work, school, or bailing on plans — for entertainment only, one click for a new one.
EXIF Remover
Strip GPS coordinates, camera model, and every other EXIF tag from a photo — orientation is baked into the pixels first, so (unlike some strippers) your photo never ends up sideways.
Eyedropper Color Picker
Pick the exact color of a single pixel from an uploaded image — a live magnified loupe follows your cursor so you can click precisely, and every sample is the exact pixel, never an average with its neighbors.
Face Analyzer
Free face shape and proportion analyzer that runs entirely on-device — upload a photo or use your camera, and an open-license face-landmark model estimates your face shape, eye spacing, and other structural proportions. No beauty score, no upload, nothing saved.
FAFSA 2027-28 Expected Contribution (SAI) Estimator
Get a simplified, illustrative estimate of your Student Aid Index (SAI) — the number that replaced the old EFC — for the 2027-28 FAFSA, which opens October 1, 2026 using 2025 tax year data. Uses the official 2027-28 income protection allowances and parent-contribution brackets plus the standard student income/asset rates, with the simplifications clearly labeled (flat 10% tax estimate, no employment expense allowance).
FairMeet
Add participants across timezones and get the fairest meeting time in the next 24 hours as a Pain Score headline, plus a rotation alternative that shifts the inconvenience to a different participant next time — not just a static overlap of timezones.
Fake IBAN Generator
Free fake IBAN generator for 14 countries with valid mod-97 checksums, for testing payment forms and fintech apps — no real bank account is attached. Unlike two popular generators we checked (10015.io, fakeiban.org), this one shows the exact checksum math (letters-to-digits, the mod-97 remainder, the final check digit) so developers can verify it themselves instead of trusting a black box, and displays a prominent test-data-only warning that neither competitor shows on-page.
Fake Tweet Generator
Create a realistic fake Tweet/X post — name, handle, verified badge, engagement stats, light or dark mode — for parody, mockups, or presentations. Free, no watermark.
Fall Foliage Peak Week Estimator
A rough historical-pattern estimate of your fall foliage peak week based on latitude and elevation — explicitly NOT a live forecast or foliage-tracking API, just a general seasonal-pattern guide with an honest uncertainty note built into every result.
Fall Vaccine Cost Calculator
Select which fall vaccines you're getting (flu, RSV, COVID-19) and whether you're insured to see an estimated cost. With a non-grandfathered insurance plan, ACIP-recommended vaccines are generally covered with no cost-sharing under ACA Section 2713 — without insurance, prices range widely, especially for RSV ($300-$550).
Family Verification Safe Word Generator
Generate a random, memorable two-word safe phrase your family can agree on in advance and use to verify identity if someone calls claiming to be a relative in an emergency. AI voice-cloning scams are rising fast — a 2026 industry report found 1 in 4 Americans received a deepfake voice call in the past year, and scammers can clone a voice from just 3 seconds of audio.
FHA Loan Calculator
Free FHA loan calculator with both upfront MIP (financed into the loan) and monthly MIP included in the payment — using the 2026 standard rates (1.75% upfront, 0.55% annual) as adjustable defaults.
Fiber Intake Calculator
Track today's fiber from common foods against your age- and sex-based daily target — no account, no paywall, no ads.
Fire Escape Plan Generator
Describe your home's floors and bedrooms and get a plain-language two-route escape plan for each area, plus a safe-charging checklist for phones, laptops, and e-bikes -- no drawing tools, no sign-up.
Flap Hero
Tap to flap and thread the gap between each pair of pipes — one touch and it is game over.
Flesch-Kincaid Readability Calculator
Paste any text and get the Flesch Reading Ease and Flesch-Kincaid Grade Level scores instantly — no button, no signup, no wait even on long documents.
Fruit Slice
Swipe across the screen to slice flying fruit — just watch out for the bombs mixed in.
FSA Year-End Forfeiture & Carryover Calculator
Find out how much of your health FSA balance is at risk when the plan year ends, whether your plan offers a $680 carryover or a grace period, and how many days you have to spend it.
Fuel Cost Calculator
Free fuel cost calculator — enter trip distance, fuel economy (MPG), and price per gallon to see exactly how much a trip will cost in gas.
Future Value Calculator
Free future value calculator that combines a starting lump sum with optional periodic deposits in one formula, and shows the exact calculation — the mirror image of our Present Value Calculator.
Gas Mileage Calculator
Free gas mileage (MPG) calculator — enter distance driven and fuel used to see your real-world fuel economy and cost per mile.
GDP Calculator
Free GDP calculator using the expenditure approach (GDP = C + I + G + net exports) — plus optional growth rate and per-capita GDP if you provide a previous period and population.
Gem Swap
Swap two adjacent gems to line up 3 or more of the same color before the 60-second timer runs out.
GFR Calculator
Free eGFR calculator using the 2021 CKD-EPI race-free equation — the current clinical standard, which removed the race coefficient used in older versions — with CKD stage classification.
Gift Card Expiration & Value Checker
Enter your state and the card's issue date to see whether your gift card should still be legally valid. Covers the federal 5-year minimum, 9 states that ban expiration entirely, and 3 states with longer minimums. Americans let roughly $23 billion in gift cards go unused every year — some of it simply because people assume a card has expired when the law says it hasn't.
Gift Wrap Cost & Sustainability Calculator
Free gift wrap cost calculator — enter how many gifts you're wrapping, disposable paper cost, and reusable furoshiki cloth cost to see your total spend and exactly how many uses it takes for reusable wrap to pay for itself.
Glassmorphism Generator
Pick any tint color for your frosted-glass CSS — checked directly, the original glassmorphism.com generator has no color control at all, its output is permanently white glass. Every slider here (tint opacity, blur, border opacity, radius) shows its live value and pairs with a number input, unlike a second competitor whose sliders have zero visible values anywhere. No login required.
GLP-1 Cost Calculator
Compare official manufacturer-published GLP-1 prices (Wegovy, Ozempic, Mounjaro, Zepbound) across cash-pay, insurance-with-savings-card, and Medicare Bridge — no lead form, no referral to any provider.
Golf Handicap Calculator
Free golf handicap calculator using the World Handicap System (WHS) formula — enter your recent rounds' scores, course ratings, and slope ratings to estimate your Handicap Index.
Google Fonts Pair Finder
Pair a heading font with a body font from Google Fonts, preview them with your own text, and copy the ready-to-use <link> and CSS code — free, no signup, no ads.
Government Shutdown Back Pay Calculator
Free calculator estimating back pay owed to furloughed or excepted federal employees under GEFTA (2019) — a guaranteed legal entitlement, not a speculative benefit. Uses the standard OPM 2087-hour pay formula, no payroll data required.
GPA Calculator
Free GPA calculator on the standard US 4.0 scale — add each course's grade and credits, toggle weighted GPA for Honors/AP/IB courses, and optionally combine with a previous GPA.
Grade Calculator
Free weighted grade calculator — add each category (homework, tests, participation...) with its weight and your score in it, and see your overall grade instantly.
Gradient Generator
Free CSS gradient generator supporting linear, radial, AND conic gradients — we checked two popular generators (cssgradient.io, 10015.io) directly and neither supports conic at all. It also includes an optional 'Animate' toggle: since browsers can't interpolate gradient colors via transition, this uses a background-position shift trick to make the gradient visibly move, something no competitor we reviewed offered — paired with a prefers-reduced-motion guard.
Gravel Calculator
Free gravel calculator — enter your area's size and desired depth and get the weight in tons, plus cubic yards and feet, using a standard gravel density.
Halloween Candy Budget Calculator
See exactly how much Halloween candy your budget buys in 2026 — and how much more it would have bought in 2020. Candy prices have climbed roughly 67% since 2020, so the same budget buys about 40% less by weight.
Halloween Candy Burn-Off Calculator
Pick the Halloween candy you ate and see what it equals in minutes of walking, dancing or jogging for your weight, using USDA FoodData Central calories and Compendium of Physical Activities MET values, without the guilt.
Halloween Costume Budget Calculator
Free Halloween costume budget calculator — compare store-bought vs DIY costume costs across everyone you're dressing up, and see how much a mix of DIY saves.
Healthy Weight Calculator
Free healthy weight calculator that gives a BMI-based weight range for your height — a single input, a clear range, and an honest note about what BMI does and doesn't capture.
Heat Index Calculator
Free heat index calculator using the NWS Rothfusz regression — enter temperature and relative humidity to see the "feels like" temperature accounting for humidity.
HEIC to JPG Converter
Convert iPhone HEIC/HEIF photos to JPG, PNG, or WebP entirely in your browser — no upload, no ads, no file limit. Drop in several photos at once and download each one, with a quality slider and live before/after size comparison.
Height Converter
Free height converter between centimeters and feet/inches — type in either one and the other updates instantly, both directions.
HELOC Calculator
Free HELOC calculator with separate interest rates for the draw period and repayment period — we checked a widely used online HELOC calculator directly: it acknowledges HELOC rates are usually variable and warns of rate uncertainty, but the calculator itself only models a single fixed rate for the entire term.
HEX to RGBA Converter
Convert between HEX, RGB, RGBA, and HSL instantly — edit any format and the other three update live, with a built-in picker and alpha slider.
Hidden Unicode / AI Prompt Scanner
Scan text live for invisible Unicode characters — the Unicode Tags block and bidi overrides are flagged High risk (the exact categories documented in real AI agent prompt-injection research), while common zero-width, NBSP, and BOM characters are flagged Low.
High-Yield Savings Opportunity Cost Calculator
Enter your balance and current bank's APY to see, in real dollars, how much you're leaving on the table compared to a representative top high-yield savings account rate -- no signup, no bank referrals, just the math.
HMAC Generator
Compute an HMAC from a message and secret key live, with an explicit key encoding selector (UTF-8, Hex, or Base64) to avoid the most common cause of mismatched results.
HOA Fee Reasonableness Checker
Enter your monthly HOA fee and this year's proposed increase to see how you compare to the 2025 national median ($135/month) and whether your increase falls in the typical range or the unusually-high range, based on 2026 board survey data.
Holiday Credit Card Debt Payoff Calculator
Free holiday credit card debt payoff calculator — plan BEFORE you shop by entering your expected holiday spend, card APR, and planned monthly payment to see months to payoff, total interest, and how your plan compares to the 2025 national average.
Holiday Flight Booking Window Savings Estimator
Free tool to check whether you're inside the reported optimal booking window for Thanksgiving or Christmas flights — enter today's date and your travel date, no price prediction algorithm, just transparent published windows.
Holiday Gift Budget Tracker
Free holiday gift budget tracker — add each person you're buying for with their own budget, see your running total update as you plan, and get an instant warning as you approach or exceed your overall holiday budget. No signup, no wish-list clutter, just the numbers.
Holiday Return Deadline & Cost Tracker
Enter a purchase date and the retailer's return window to get the exact deadline date and days remaining, with 2026 US data on why holiday returns run higher and cost retailers more to process.
Holiday Shipping Deadline Calculator
Free USPS 2026 holiday shipping deadline calculator — pick your mail class and destination to get a single clear ship-by date and a live countdown of days remaining, instead of scanning a static news-article table.
Holiday Shopping Budget Channel Allocator
Free holiday shopping budget allocator by channel — split your total budget across small business, big-box retail, and online, anchored on the 2026 survey finding that shoppers plan to direct 41% of holiday spending to small businesses.
Holiday Tipping Calculator
Free holiday tipping calculator and guide — see suggested tip ranges for 8 regular service providers (mail carrier, doorman, house cleaner, and more), enter what you plan to give each, and track the running total against your holiday tipping budget. Flags which providers can't legally accept cash.
Home Equity Loan Calculator
Free home equity loan calculator that checks your requested amount against a typical combined loan-to-value limit AND calculates the payment, in one page — we checked a widely used online home equity loan calculator directly and it splits these into two separate tools (one for LTV limits, one for payment), with no combined view.
Home Insurance Non-Renewal Risk Checker
Free home insurance non-renewal risk checklist — not a quote generator. Answer a few risk-factor questions to see a rough risk category, based only on public NAIC and FIO/Treasury aggregate statistics, not insurer-specific data.
Horsepower Calculator
Free horsepower calculator estimating rear-wheel horsepower from a quarter-mile trap speed or elapsed time (ET) and vehicle weight, using the standard drag-racing formulas.
Hours Calculator
Free hours calculator that shows the exact hours and minutes between two clock times — with an optional unpaid break deduction and automatic overnight-shift handling.
House Affordability Calculator
Free house affordability calculator using the 28/36 rule — enter your income, debts, and down payment to see the max home price you can afford, broken into loan, tax, insurance, and HOA.
HTML Entity Encoder/Decoder
Encode text to safe HTML entities or decode entities back to text live as you type — decoding covers numeric entities and around 100 common named entities like © and ™, not just the basic 5.
HTML Minifier / Formatter
Minify or format HTML live, with an instant byte-size reduction percentage — content inside pre, textarea, script, and style tags is always preserved byte-for-byte.
HTTP Status Code Reference
Search every standard HTTP status code by number or name, with a plain-English summary first (not just raw RFC text), plus explicit "often confused with" notes for pairs like 401 vs 403 and 502 vs 503 vs 504.
Ideal Weight Calculator
Free ideal weight calculator showing all four classic formulas (Devine, Robinson, Miller, Hamwi) side by side — not just one number, so you can see how much these decades-old formulas actually disagree.
Image Color Balance Filter
Adjust an image's Red, Green, and Blue channels independently with manual sliders — no AI auto-correct guessing what you want, so you can deliberately push a color cast rather than fight one.
Image Compressor
Compress JPEG, PNG, and WebP images entirely in your browser with a quality slider and a live before/after file size comparison. No upload, no file count limits.
Image Cropper
Crop an image right in your browser — drag to select the area, pick a preset ratio (1:1, 4:3, 16:9) or go freeform, and download. No upload limit, no watermark: your photo never leaves your device.
Image Format Converter
Convert images between PNG, JPEG, WebP, and AVIF entirely in your browser — no upload, no daily conversion limit, with a live before/after file size comparison.
Image Resizer
Resize an image to exact pixels or a percentage — aspect ratio is locked by default so you can't accidentally stretch a circle into an oval, unlike tools where that protection is an easy-to-miss opt-in toggle.
Image Rotator
Rotate an image by 90°, 180°, or a free -45° to 45° angle to straighten a tilted shot — the canvas auto-expands so corners are never clipped, unlike tools that crop whatever spills past the original frame.
Images to PDF
Turn JPG, PNG and other images into one PDF, one image per page. Drag to set the page order, choose A4, US Letter or a page that matches each image, and set the margin. JPG and PNG files are embedded without recompression, everything runs in your browser, and there is no watermark or signup.
iMessage Chat Mockup Generator
Create a realistic fake iMessage/SMS conversation — blue and gray bubbles, Delivered/Read receipts, and an iOS status bar — for mockups, memes, or presentations. Free, no watermark, zero network requests.
Income Tax Calculator
Free federal income tax calculator using the real 2026 IRS tax brackets and standard deduction — shows your actual marginal bracket versus your true effective tax rate, which are very different numbers.
Inflation Calculator
Free inflation calculator using real US CPI-U data (2000-2026) to convert an amount from any year to its equivalent purchasing power in any other year — cumulative inflation included.
Instagram DM Mockup Generator
Create a realistic fake Instagram DM conversation — gradient sent bubbles, Seen receipts, and a contact header — for mockups, memes, or presentations. No login, no watermark.
Instagram Post Mockup Generator
Create a realistic fake Instagram feed post — profile, caption, likes, comments, and photo — for presentations, design mockups, or memes. No login, no watermark, everything renders in your browser.
Instagram Story Mockup Generator
Create a realistic fake Instagram Story — 9:16 with a progress bar, profile header, timestamp, and text overlay — for presentations or mockups. No login, no watermark, all client-side.
Instagram-Style Photo Filter
Apply 6 Instagram-style preset filters with an intensity slider to blend the effect strength, plus brightness/contrast fine-tuning on the same screen — 100% client-side, no watermark, no login.
Interest Rate Calculator
Free interest rate calculator that finds the rate from loan amount, payment, and term — and shows a verification line proving the rate actually reproduces your payment. We checked a widely used online interest rate calculator directly: it gives a number but never explains its method.
Internet Speed Test
Check your download speed, latency and jitter in one click, with no ads, no signup and no app. The test downloads random files from OllTools' own server, so it shows your connection to this site rather than acting as a neutral multi-server benchmark. It reports the median and peak of several runs, places the result on a gauge, and tells you in plain words what the speed is enough for.
Invoice Generator
Build a professional invoice with line items, tax, and totals calculated automatically, then save it as a PDF straight from your browser — no signup, no account, no watermark, and nothing is ever uploaded to a server.
IP Address Checker
See your public IP address, approximate location, and ISP instantly — no ads, no pop-ups, no waiting for a heavy page to load.
IP Subnet Calculator
Paste a CIDR address (192.168.1.0/24) in one field — no separate IP and subnet-mask dropdown — and get the network, broadcast, and usable host range, with /31 (RFC 3021 point-to-point) and /32 (single host) handled correctly instead of the naive formula that gets both wrong.
iPhone 18 Trade-In Value Estimator
Free, neutral trade-in value estimator for people upgrading to the iPhone 18 Pro/Pro Max (the only iPhone 18 models out so far) — see a rough independent buyback range for your current iPhone next to what carrier 'up to $1,200' trade-in promotions actually require (a new line, a premium plan, and credit spread over 24-36 months). No specific carrier or buyback service pushed.
IRA Calculator
Free IRA calculator covering both Traditional and Roth in one tool, with a live 2026 contribution limit check ($7,500, or $8,600 at age 50+) and a Roth income phase-out check by filing status — most calculators split these into separate tools or skip the income check entirely.
IRR Calculator
Free IRR (internal rate of return) calculator where you paste a whole list of cash flows at once — we checked a widely used online IRR calculator directly and it uses individual fields up to 'Year 50', one box per year, with no way to paste a full list in one go.
JavaScript Minifier / Formatter
Minify or format JavaScript live, powered by terser — the same industry-standard parser used by major bundlers — so your code's behavior is never changed, and /*! @license @preserve comments always survive.
JSON Formatter & Validator
Format, validate, and explore JSON — beautify, minify, and a collapsible tree view, all on one page with no submit button.
JSON to CSV Converter
Convert JSON to CSV live — no button. Automatically finds the array of objects to convert (and tells you which field it used), and flattens nested objects and arrays with one consistent, predictable rule.
JSON to TOML Converter
Paste JSON and get TOML instantly — nested objects become [section] headers, arrays of objects become [[array-of-table]] blocks, and TOML's real constraints (no null, no mixed-type arrays) are flagged clearly instead of silently producing invalid output.
JSON to YAML Converter
Paste JSON and get YAML instantly, no Convert button — with ambiguous strings like "yes" or "12:00:00" automatically quoted so they don't get silently reinterpreted as booleans or times when the YAML is read back.
JSON Tree Viewer
Explore JSON as a live, collapsible tree — click any node to see and copy its JSONPath, no button to click, and the top level opens automatically while nested branches stay collapsed for large files.
JWT Encoder/Decoder/Verifier
Decode a JWT's header and payload instantly, see exp/iat as readable dates with expiry status, and verify an HS256 signature — entirely in your browser, with zero network requests.
Large CSV Splitter
Split a large CSV into smaller files by row count — Excel caps out at 1,048,576 rows and crashes on anything bigger, and every chunk here keeps the header row (a common thing splitters forget).
Lean Body Mass Calculator
Free lean body mass calculator using the Boer formula — a quick estimate of your fat-free mass from height, weight, and sex, no body fat percentage measurement required.
Leftovers Safe-Until Date Calculator (USDA Guidelines)
Enter what you cooked and when to get the date to eat or throw out your leftovers, plus when to freeze them, using the USDA refrigerator and freezer storage chart and the 2-hour rule.
List Randomizer
Free list randomizer / random name picker for raffles, giveaways, and team assignment — with a 'remove picked entries' toggle on by default, so drawing 1st, 2nd, and 3rd place in a row never repeats a winner. We checked two popular pickers (gigacalculator.com, randomlists.com) directly and neither documents this mode. No ads anywhere in the working area, by this site's design.
Loader Generator
Generate a CSS loading spinner that includes accessibility markup by default — role="status", a screen-reader-only "Loading…" label, and a prefers-reduced-motion block that stops the animation — instead of leaving it up to you (a well-known competitor's output, checked directly, is a bare <div class="spinner"></div> with none of that).
Loan Calculator
Calculate your monthly loan payment, total interest, and full amortization schedule instantly — no Calculate button, and see how extra payments cut your interest.
Lorem Ipsum Generator
Generate placeholder Lorem Ipsum text by paragraphs, sentences, or words — updates instantly, no page reload, with a link that reproduces the exact same text.
Lottery Jackpot Tax Calculator
Free lottery winnings tax calculator for Powerball, Mega Millions, and other US lotteries — separates the 24% federal withholding taken immediately from the real tax bill at your top bracket, plus real 2026 state tax rates for all 50 states.
Love Calculator
Free love calculator using the classic FLAMES party game — watch the letters cancel out and the result get counted out live, then download a certificate with a QR code.
Macro Calculator
Free macro calculator that shows carbohydrate, protein, and fat targets all at once from your TDEE — instead of the separate carb, protein, and fat calculators most sites split into three different pages.
Magnesium Glycinate Dosage Calculator
Free magnesium glycinate dosage calculator using NIH Office of Dietary Supplements RDA and UL figures — see your age/sex RDA, a goal-based elemental magnesium target, and the equivalent glycinate compound dose. No affiliate product links.
Mammogram Cost Estimator
Estimate what a mammogram costs based on exam type (screening vs. diagnostic), facility type, and insurance — with verified 2026 uninsured price ranges and a prominent link to the CDC's free/low-cost National Breast and Cervical Cancer Early Detection Program for Breast Cancer Awareness Month.
Margin Calculator
Free margin and markup calculator that factors in a selling fee percentage — payment processor or marketplace commission — before computing your real margin. We checked a widely used online margin calculator directly: it correctly shows both margin and markup side by side, but treats cost as a single number with no way to account for a percentage-based fee taken out of the sale.
Markdown Editor
Write Markdown with a live preview side by side — supports GitHub Flavored Markdown (tables, task lists, strikethrough), and auto-saves as you type so nothing is lost on refresh.
Marriage Tax Calculator
Free marriage tax calculator comparing combined tax if both spouses filed single versus filing jointly — using the real 2026 federal brackets, showing exactly whether you'd face a marriage penalty or bonus.
MD5 Hash Generator
Generate an MD5 hash from text or a file live, entirely in your browser — for checksums and file-integrity checks only, never for password storage.
Medicare Part D 2027 Cost Change Estimator
Free 2027 Medicare Part D cost breakdown — confirmed CMS figures (deductible, out-of-pocket cap) clearly separated from estimated national averages, plus an annual enrollment period countdown. No ZIP code or personal info required.
Meeting Agenda Template
Build a time-boxed meeting agenda in your browser: add attendees, topics, owners and minutes, and each item's start and end time is calculated from your meeting start. A running total warns you when the agenda outgrows the meeting length, and a notes and action-items section rounds it out. Print or save it as a PDF — no signup, no watermark, nothing uploaded.
Melatonin Dosage Calculator
Free melatonin dosage calculator based on the actual dose-response research (Brzezinski et al. 2005, Sleep Medicine Reviews) — see the effective starting dose range, why it's far lower than most store-bought pills, and how it compares to what's commonly sold.
Menopause Age Estimator
A menopause age range estimator built to be honest about its own limits — combines your mother's menopause timing and smoking history with published averages to show a plausible range, never a false-precision single year.
Menopause HRT Cost Estimator
Pick your HRT delivery method and insurance status to see a realistic monthly and annual out-of-pocket cost range -- no sign-up, no specific brand or provider pushed.
Meta Tag & Open Graph Generator
Generate basic SEO meta tags, Open Graph tags, and Twitter Card tags all at once from a title, description, URL, and image — with a live preview of how the link card looks on X and Facebook, so you never forget the tag that tanks your click-through rate.
Midterm Voter Registration & Early Voting Deadline Checker
Pick your state to see its voter registration deadlines, same-day registration rules, and early voting window for the November 3, 2026 midterm election, with a countdown and a link to your official state page.
Mileage Calculator
Free mileage reimbursement calculator with the current 2026 IRS business rates (72.5¢/mile Jan–Jun, 76¢/mile Jul–Dec) preset, plus a custom-rate option for other purposes.
Military Time Converter
Convert between 12-hour (AM/PM) and 24-hour (military) time instantly, with a full 00:00-23:00 reference chart always visible — no ads, no signup.
MIME Type Lookup
Look up a file extension or MIME type — with the standard value plus any legacy/nonstandard alternates actually seen in the wild, an explicit note where a widely-used server's default config disagrees with the current spec (like nginx still serving .js as application/javascript), and a fallback explanation for extensions that aren't registered at all.
Minesweeper
Clear every safe tile on an 8x8 board with 10 hidden mines — tap to reveal, use flag mode to mark the ones you suspect.
Molarity Calculator
Free molarity calculator that solves for molarity, moles of solute, or solution volume from the other two — using M = mol/L from any direction.
Molecular Weight Calculator
Free molecular weight calculator — type any chemical formula (with parentheses for grouped subscripts) and get the exact molar mass using IUPAC standard atomic weights, plus the element breakdown.
Mortgage Calculator
Free mortgage calculator that shows your full monthly payment (PITI) — principal, interest, property tax, home insurance, PMI, and HOA — not just the loan payment competitors stop at.
Mulch Calculator
Free mulch calculator — enter your garden bed's size and desired depth and get the cubic yards, cubic feet, and number of bags needed.
NaNoWriMo Daily Word Count Pace Calculator
Free NaNoWriMo-style daily word count pace calculator — set any word goal (50,000 default), your start and end dates, and words written so far, and see exactly how many words a day you need, recalculated instantly if you fall behind.
No Tax on Overtime Calculator
Free No Tax on Overtime calculator for the OBBBA 2025-2028 federal deduction — no signup, shows your deduction on the FLSA overtime premium, MAGI phase-out, and estimated federal tax savings.
No Tax on Tips Calculator
Free No Tax on Tips calculator for the OBBBA 2025-2028 federal deduction — no signup, shows your deduction, MAGI phase-out, and estimated federal tax savings side by side.
Ohm's Law Calculator
Free Ohm's law calculator (the "power wheel") — fill in any two of voltage, current, resistance, and power, and the other two are calculated automatically.
Oktoberfest Personal Beer Budget Calculator
Calculate your personal Oktoberfest beer budget using the verified 2026 average price of €15.61/liter (+2.38% vs. 2025) — just enter days attending and liters per day, in EUR or USD with an editable exchange rate. Built as an annual-reusable calculator so next year's price update is a one-line change.
One Rep Max Calculator
Free one rep max calculator showing both the Epley and Brzycki formulas side by side, plus a full training percentage table (60-95% of 1RM) — not just a single estimated max.
Org Chart Template
Type your team as an indented list and get a clean organization chart drawn instantly. Indent a line to make that person report to the line above, add a job title after a bar, and print the chart as a PDF or download it as an SVG. No box limits, no signup, no watermark, and nothing is uploaded.
Ovulation Calculator
Free ovulation calculator that estimates your fertile window and ovulation date from your last period and cycle length — the same underlying calculation as a conception calculator, in one tool.
Pace Calculator
Free running pace calculator that solves for pace, time, or distance — whichever one you don't know — and shows results in both min/km and min/mile at once.
Package Theft / Porch Piracy Prevention Checklist
An interactive checklist of real prevention steps for package theft (porch piracy), plus a clear explanation of what carrier default liability (usually ~$100) actually covers -- and why it usually does NOT cover a package stolen after it was already delivered.
Password Generator
Generate cryptographically random passwords instantly — up to 128 characters, up to 20 at once, with an option to exclude ambiguous characters and a live strength meter.
Password Reuse Exposure Calculator
See the illustrative blast radius of reusing one password across accounts — enter how many accounts share it and whether they include email, banking, or social accounts, and see how many become at-risk if just one of those sites leaks. 100% client-side: never accepts or transmits an actual password.
Password Strength Checker
Check a password's real-world strength using pattern-based analysis (not raw entropy) — see exactly why it's weak and what to change, entirely in your browser.
Payback Period Calculator
Free payback period calculator with both simple and discounted payback period, side by side, plus the full cumulative cash flow table — paste any pattern of irregular annual cash flows.
Payment Calculator
Free payment calculator that solves the problem this site's other loan calculators don't: 'I can afford $X a month — how long until it's paid off?' Switch between the usual fixed-term mode and a fixed-payment mode that solves for time instead.
PDF Merge
Combine several PDF files into one document in your browser. Drag to reorder, see each file's page count, and download the merged PDF. Files are never uploaded, there is no file-count limit from us, no watermark and no signup.
PDF Metadata Editor
View and edit a PDF's Title, Author, Subject and Keywords — the document properties most PDF viewers show — right in your browser. Clear a leftover author name before sharing a file, or fill in proper metadata for a document you're publishing. Nothing is uploaded, no watermark, no signup.
PDF Page Delete & Reorder
Remove pages you don't need and drag the rest into a new order, all in your browser. See each page's original number as you work, then download the result. Nothing is uploaded, no watermark, no signup.
PDF Page Rotator
Rotate any page — or every page — of a PDF by 90, 180 or 270 degrees, right in your browser. Pick pages individually, so a scanned document with a mix of upright and sideways pages can be fixed in one pass. Nothing is uploaded, no watermark, no signup.
PDF Split
Split a PDF or pull out just the pages you need, right in your browser. Extract selected pages into one file, split by ranges into separate PDFs, or cut every N pages — multiple results download as one ZIP. Nothing is uploaded, and there is no watermark or signup.
PDF Watermark Adder
Stamp a text watermark — CONFIDENTIAL, DRAFT, your own wording — across every page of a PDF, right in your browser. Choose a single centered mark or a tiled diagonal pattern, and control color, opacity, size and angle. Nothing is uploaded, no watermark of ours is added, no signup.
Pension Calculator
Free pension calculator using the standard defined-benefit formula (years of service × multiplier × final average salary), with an early-retirement reduction so you can see the real impact of retiring before your plan's normal age.
Period Calculator
Free period calculator that predicts your next 6 cycles from your last period date and average cycle length — not just the next one.
Pet Adoption Total Cost Calculator
Calculate the one-time total cost of adopting a pet -- adoption fee plus first-time setup costs like a vet visit, supplies, and a microchip -- kept clearly separate from ongoing monthly care costs. Built for Adopt a Shelter Dog Month.
Pet Age Calculator
Convert your dog or cat's age to human years using the modern vet-recommended method — not the outdated "times 7" myth.
Pet Insurance Cost Estimator
See the national average pet insurance premium for dogs ($836/year) and cats ($435/year), based on NAPHIA's 2026 State of the Industry report (2025 data), and project your cost over multiple pets and multiple years. This is a ballpark national average, not a quote — actual premiums vary widely by breed, age, and location.
Photo Censor / Face Pixelator
Automatically detect and pixelate or blur every face in a photo, entirely in your browser — no upload, no watermark, no signup. Missed a face? Drag to add a manual censor box.
Photo Privacy Checker
Check a photo for hidden GPS location live — nothing is ever uploaded. Works with JPG, PNG, WebP, and HEIC/HEIF (iPhone photos). A red banner and map link show exactly where it was taken; a green banner confirms when it's clean; an amber banner is honest when metadata can't be fully verified rather than falsely claiming safety. Download a copy with all metadata removed in one click.
Physical Therapy Cost Estimator
Estimate the total cost of a course of physical therapy without insurance -- pick private practice or hospital outpatient, enter how many sessions you expect, and see a realistic total cost range based on cross-checked 2026 industry cost data.
Pi Digit Generator
Calculate pi (π) to up to 5,000 decimal digits, computed live in your browser — not a pre-baked lookup table.
Piano Tap
Tap each falling tile in its lane before it slips past — every correct tap plays a real note, so a good run sounds like a tiny tune.
Pirate Speak Translator
Turn your text into pirate speak instantly — a straight word-swap dictionary, no AI rewrite, no waiting.
Podcast Name Generator
Generate podcast name ideas from a topic, grouped by type (pun, descriptive, two-word combo) instead of one random pile — with a clear reminder that Apple/Spotify directory name collisions aren't checked.
Podcast Script Template
Plan a podcast episode segment by segment: give each part a length and your talking points or script, and the tool works out running timestamps, estimates how long your script takes to read aloud, and warns when the episode outgrows your target length. Start from a solo, interview or two-host format, print it in large type for reading, or save as PDF. No signup, nothing uploaded.
Pomodoro Timer
A free Pomodoro focus timer with fully customizable focus/short-break/long-break lengths — no ads, no subscription, no account, unlike apps that lock timer length changes behind a paywall.
Power Outage Emergency Kit Generator
Enter the people, pets and infants in your household and get a printable power outage checklist with water and supply quantities drawn only from Ready.gov and FEMA guidance.
Pregnancy Calculator
Free pregnancy calculator that works both directions — from your last period to a due date, or backward from a known due date to your estimated conception window — with current gestational age and trimester shown either way.
Pregnancy Weight Gain Calculator
Free pregnancy weight gain calculator using the US Institute of Medicine's 2009 guidelines — your recommended total weight gain range based on your pre-pregnancy BMI category.
Present Value Calculator
Free present value calculator that combines a lump-sum future value with optional periodic deposits in one formula — we checked a widely used online present value calculator directly and it treats lump-sum and periodic-deposit scenarios as two separate calculators, with no way to combine them, and never shows the formula it used.
Product Recall Finder
Search a product name and instantly see FDA food, drug, and device recalls together — with full Class I/II/III/Not Yet Classified labeling, not a 3-category guess. Covers US FDA data only.
Profile Picture Maker
Crop your photo to a circle or square, add a border and background color, and export it at the exact pixel size each platform wants — LinkedIn, X, Discord, GitHub, Facebook — all in your browser, no upload, no watermark.
Protein Calculator
Free protein calculator using the 2026-updated USDA/HHS activity-based range — no account, no paywall, with a running tally from 6 common high-protein foods.
Protein Powder Lead Exposure Checker
Enter a lead content figure you found on a lab report, product label, or recall notice (in micrograms per serving) to see how it compares to California's Prop 65 Maximum Allowable Dose Level for lead (0.5 mcg/day). Motivated by Consumer Reports' October 2025 testing of protein powders and shakes, which found many products exceeded California safety thresholds — this tool doesn't assert data about any specific brand; it only does the math on the number you enter.
Pumpkin Patch & Apple Picking Family Outing Cost Calculator
Estimate the total cost of a family pumpkin patch and/or apple picking trip based on party size, weekday vs. weekend, and a rough regional price tier -- because exact per-farm pricing varies wildly (from about $7 to $45+ per person) and changes every season.
Pumpkin Spice Latte Inflation Tracker
Free pumpkin spice latte cost calculator — enter how many PSLs you buy per week and see your personal seasonal spend, plus how much of the 2005-2026 price increase is 'excess' over general inflation.
QR Code Generator
Generate QR codes for URLs, text, WiFi, email, or phone numbers instantly — static codes that never expire, no subscription, no account.
QR Code Reader
Decode a QR code from an uploaded image entirely in your browser — if the result is a URL, the domain is highlighted with a safety warning before you open it, instead of a plain "open link" button.
Rain Window Finder
Tap one button and instantly see the longest low-rain window in the next 24 hours — a clear headline answer, not just a grid of hourly percentages to scan yourself. Works even if you don't grant precise GPS access.
Random Number Generator
Free random number generator with custom range, decimal-place support, no-duplicates mode, and sorting — using the Web Crypto API (crypto.getRandomValues) as its randomness source, and saying so on the page. We checked two popular generators (commentpicker.com, calculatorsoup.com) directly: both are integer-only with no decimal option, and one only vaguely calls itself a 'PRNG' without naming its actual source.
RAP (Repayment Assistance Plan) Payment Calculator
Enter your AGI and dependents to see your monthly payment under the new federal Repayment Assistance Plan (RAP), step by step: the income tier, the $50-per-dependent reduction and the $10 minimum.
React Native Shadow Generator
Tune a shadow with live iOS and Android previews — Android's opacity falls off exponentially as elevation increases, not linearly like most generators assume — and copy Platform.select-wired StyleSheet.create code, ready to paste.
Reading Time Estimator
Paste any text and see how long it takes to read — live, with slow/average/fast presets or your own measured words-per-minute speed.
Real Estate Flyer Template
Turn a property's details into a one-page flyer you can print or save as a PDF. Pick For Sale, For Rent, Open House, Just Listed or Sold, add the address, price, beds, baths and highlights, drop in a main photo and up to three extra pictures, and add your agent details. A page-fit meter tells you if it will spill onto a second page. No watermark, no signup, and photos never leave your browser.
Recommendation Letter Template
Fill in a few blanks and get a complete recommendation letter built around real examples, not empty adjectives. Enter who you are, who you are recommending and how you know them, add up to three strengths with a concrete example each, and the tool assembles the letter. It flags generic wording and shows the word count against the 300 to 500 word range. Print or save as PDF, nothing uploaded.
Refinance Calculator
Free refinance calculator that shows your break-even point in months — not just the monthly savings competitors stop at — so you know exactly when a refinance actually pays off.
Regex Tester
Test a JavaScript regular expression against any text — matches highlight live, and every match lists its numbered and named capture groups. Uses your browser's native regex engine, not a separate flavor to translate mentally.
Regional Pizza Price Index Checker
Compare what you paid for a medium cheese pizza against NetCredit's 2026 U.S. Pizza Index regional price bands, and see instantly whether you overpaid or got a deal -- for National Pizza Month.
Relationship Calculator
Free relationship calculator that shows exactly how long you've been together — down to the second, live-updating — with an automatic fireworks celebration for 1st through 10th anniversaries.
Rent Calculator
Free rent calculator using the 30% rent-to-income guideline, with a bidirectional mode — enter income to see max rent, or enter a target rent to see the income needed.
Rent Increase Fairness Checker
Enter your current rent and the renewal price to see the percentage increase and how it compares with national rent growth from two trackers, with clear notes on why trackers disagree.
Rent vs. Buy Calculator
Free rent vs. buy calculator that runs a real month-by-month simulation — including the opportunity cost of investing your down payment instead — to compare net worth from renting versus buying, not just monthly payments.
Rental Property Calculator
Free rental property calculator showing monthly cash flow, cap rate, and cash-on-cash return together — factoring in vacancy rate, mortgage payment, taxes, insurance, and maintenance/management costs.
Resistor Color Code Calculator
Free resistor color code calculator for both 4-band and 5-band resistors — pick each band's color from a dropdown and see the resistance value and tolerance instantly, with a visual preview of the resistor.
Resume Template
Build a clean, single-column resume in your browser and save it as a PDF. The layout uses plain text headings and bullet lists that applicant tracking systems can read, so nothing turns into scrambled text. Add jobs, education, skills and an extra section, choose A4 or US Letter, and print or save — no signup, no paywall at download, no watermark.
Retirement Calculator
Free retirement calculator that projects your savings by retirement age and estimates your monthly retirement income using the withdrawal-rate rule — not just a raw future-value number.
Return-to-Office Cost Calculator
Enter your own commute, parking and food costs plus commute time to see what going into the office really costs per day and per year, with cash costs and time value shown separately.
RMD Calculator
Free RMD (Required Minimum Distribution) calculator using the actual IRS Uniform Lifetime Table divisors — the same official table that's applied to every distribution year since 2022.
Road Hopper
Hop your way up a 9-lane board — safe strips and traffic lanes always alternate, so you only ever cross one road at a time.
ROI Calculator
Free ROI calculator showing both simple ROI and annualized ROI — the more meaningful figure for comparing investments held for different lengths of time.
Roman Numeral Converter
Free Roman numeral converter — type a number or a Roman numeral into either field and the other updates instantly, both directions, with standard-form validation.
Roofing Calculator
Free roofing calculator that converts your building's footprint and roof pitch into actual roof surface area, squares, and shingle bundles needed — accounting for the extra surface a steeper pitch adds.
Rope Drop
Watch the candy swing on its rope and cut at just the right moment so it arcs straight into the mouth below.
RSA Key Pair Generator
Generate an RSA public/private key pair entirely in your browser, in PEM format — only 2048-bit and up, no weak key sizes offered.
Salary Calculator
Free salary calculator that converts pay between hourly, daily, weekly, biweekly, semi-monthly, monthly, quarterly, and annual — with adjustable hours per day, days per week, and unpaid weeks off. No tax deductions, just conversion.
Sales Tax Calculator
Free sales tax calculator with real 2026 state and average combined (state + local) rates for all 50 states — pick your state and see the tax and total instantly, or enter a custom rate.
SALT Deduction Cap Calculator (2026)
Work out your 2026 state and local tax (SALT) deduction cap after the income phase-down, how much of your taxes you can still deduct, and whether itemizing beats the standard deduction.
SAVE Plan Ending — Standard Repayment Estimator
The SAVE plan's interest-free forbearance was scheduled to end by September 30, 2026, and loan servicers have been sending 90-day notices (since July 1) requiring borrowers to pick a new plan or be auto-enrolled in Standard Repayment — a 10-year fixed schedule that can jump from $0/month to hundreds of dollars. Enter your balance and rate to estimate that new payment, plus a reminder that income-driven plans like IBR or RAP may be lower.
Sci-Fi Name Generator
Turn your own name into a sci-fi hero and villain name using two classic spell-it-out formulas — not a lookup of any existing character names.
Screen Time / Digital Detox Value Calculator
Free screen time calculator with disclosed, honest equivalents (not inflated marketing numbers) — see your annual screen time in hours, days, books, sleep, and flights, plus real cited digital-detox research. No app download or signup required.
Seasonal Holiday Job Earnings Calculator
Enter your hourly pay, weekly hours and number of weeks to see what a seasonal holiday job could pay, before and after rough tax estimates, and compare it with your own take-home goal.
Secret Santa Budget & Matching Generator
Free Secret Santa name matcher with no signup or email required — enter names, get a fair matching (no one draws themselves, no mutual pairs) revealed one card at a time, plus a $20-30 budget guideline.
Self-Employment (1099) Quarterly Tax Calculator
Free 1099 quarterly tax calculator combining real 2026 self-employment tax (Social Security + Medicare on 92.35% of net profit) with federal income tax — no app download, no signup, and shows the exact dollar amount due at each of the four IRS quarterly deadlines.
Senior Bonus Deduction Calculator (2026 Rules)
Find out how much of the new $6,000-per-person senior deduction you can claim for 2026 after the 6% income phase-out, how much federal tax it saves, and how it stacks on top of the regular age-65 standard deduction.
SEO Slug Generator
Turn any title or sentence into a clean, SEO-friendly URL slug instantly — pick dash or underscore, and cap the length without cutting words in half.
Severance Pay Calculator
Free severance pay tax calculator — separates the 22%/37% federal supplemental withholding (a withholding rate, not your real tax rate) from FICA, state withholding, and what you'll actually owe at filing, so you know why your check landed smaller than expected.
SHA-224 Hash Generator
Generate a SHA-224 hash from text or a file live, on one page — no ads, no button, and a clear warning that raw hashes like this shouldn't be used for password storage.
SHA-256 Hash Generator
Generate a SHA-256 hash from text or a file live, on one page, entirely with your browser's own Web Crypto API — nothing is ever transmitted anywhere.
SHA-384 Hash Generator
Generate a SHA-384 hash from text or a file live, and compare it against an expected checksum instantly — useful for verifying a downloaded file's integrity.
SHA-512 Hash Generator
Generate a SHA-512 hash from text or a file live, and compare it against an expected checksum instantly — useful for verifying a downloaded file's integrity.
SHA1 Hash Generator
Generate a SHA-1 hash from text or a file live, entirely in your browser — with no arbitrary file size cap, and a clear warning that SHA-1 shouldn't be used for security purposes.
Shoe Size Conversion Calculator
Free shoe size converter between US Men's, US Women's, UK, EU, and foot length in cm — enter a size in any system and see it converted to all the others.
Shrinkflation Calculator
See the real price increase hidden in a smaller package — enter the old and new size/price and get the true per-unit inflation rate, not just the sticker price change, plus what it costs you per year.
Simple Interest Calculator
Free simple interest calculator (non-compounding: I = P × r × t) that solves for any of the four variables — end balance, principal, rate, or time — plus a downloadable year-by-year schedule.
Sleep Cycle Calculator
Free sleep cycle calculator based on 90-minute sleep cycles — enter a wake-up time to see bedtime options, or a bedtime to see wake-up options, for waking up at the end of a full cycle.
Sling Bird
Pull back and release to launch the bird at the pigs — clear every pig before you run out of birds.
Snake
Steer the snake to eat food and grow — hitting a wall or your own tail ends the round.
Snow Day Probability Estimator
Free snow day probability estimator that shows its work — enter forecasted snowfall, temperature, day of week, and your district's closure tendency to get a transparent score with every factor's contribution shown separately, not one unexplained percentage.
Sober October Savings Calculator
Enter how many drinks you have in a typical week and what they cost to see the money you would keep over a month without drinking and over a year, with no judgement attached.
Social Security Calculator
Free Social Security benefit estimator using the actual 2026 bend-point formula ($1,286 / $7,749), with early and delayed claiming age adjustments — clearly labeled as an estimate, since a full official calculation needs your real 35-year wage-indexed earnings history.
Solitaire
Classic Klondike solitaire — build the four foundation piles up from Ace to King. Tap a card, then tap where you want it to go.
Speed Calculator
Free speed calculator that solves for speed, distance, or time from the other two — using speed = distance ÷ time from any direction.
Spiral Drop
Drag left or right to rotate each ring so the ball falls through the gap — land on a red trap segment and it is game over.
Square Footage Calculator
Free square footage calculator for rectangles, circles, and triangles — get the area in square feet, square yards, and acres, plus a total cost estimate if you know the price per square foot.
Stair Calculator
Free stair calculator — enter the total floor-to-floor rise and get the number of steps, riser height, total run, and stair angle, with a check against typical US residential building code.
Streaming Service Total Cost Tracker
Check off the streaming services you subscribe to and pick each plan tier to see your real monthly and annual total, using verified September 2026 US pricing for Netflix, Disney+, Max, Hulu, Prime Video, Apple TV+, Paramount+, and Peacock. No login, no bank account link, nothing tracked.
Student Loan Calculator
Free student loan calculator pre-filled with the real 2026-27 federal Direct Loan rates, showing monthly payment and total interest across all common repayment terms (10/15/20/25 years) side by side — not just one fixed schedule.
Student Loan Forgiveness Tax Impact Calculator
Free calculator for the 2026 student loan forgiveness "tax bomb" — estimates the actual incremental federal tax on IDR forgiveness across 2026 brackets, with the insolvency exclusion (IRC §108) built in. PSLF/teacher/disability discharge correctly shown as tax-free.
SVG Blob Generator
Generate organic blob shapes as real SVG, with a color picker as a first-class control (not a post-export code edit) plus point-count and randomness sliders — copy the code or download the .svg file.
SVG Pattern Generator
Build an icon-motif SVG pattern (dots, cross, circles, waves, hexagons) with size, spacing, and rotation sliders, then download a real .svg file — not just a CSS background snippet.
SVG Stroke to Fill Converter
Convert stroked SVG paths into filled outline shapes for laser cutters, cutting plotters, and icon systems that don't support the stroke attribute. Free, all client-side, side-by-side before/after preview.
SVG to PNG Converter
Convert SVG to PNG at the exact resolution you need — rendered directly at that size (not upscaled afterward), so the result stays sharp instead of the blurry PNGs you get from converters that only export at the SVG's tiny default size.
Switch/Toggle Generator
Generate a sliding toggle switch with role="switch" and a real label included by default — checked directly, a popular competitor's generated code is a bare, unlabeled <input type="checkbox"> with neither, so screen readers announce it as an unnamed checkbox instead of "switch, on/off", the exact metaphor the visual design promises.
Take-Home-Paycheck Calculator
Free take-home pay calculator combining real 2026 federal income tax brackets with FICA (Social Security and Medicare) — breaks out exactly where each dollar of withholding goes, by any pay frequency.
Target Heart Rate Calculator
Free target heart rate calculator using the Karvonen method (heart rate reserve), with a choice between the traditional 220-minus-age formula and the more accurate Tanaka formula for max heart rate.
Tariff Impact Calculator
Free tariff impact calculator — enter an item's pre-tariff price and a tariff rate to see the added cost, the new price, and the percent increase, with an adjustable pass-through assumption since retailers don't always pass 100% of a tariff on to shelf prices.
Tax Extension Deadline Penalty Calculator
Free calculator that separates the two different IRS penalties people conflate after missing the Oct 15, 2026 tax extension deadline: failure-to-file (5%/month from Oct 15) and failure-to-pay (0.5%/month from the original Apr 15 deadline) — plus the $525 minimum penalty rule for returns more than 60 days late.
TDEE Calculator
Free TDEE calculator that shows exactly how much a wrong activity-level pick can cost you — up to 250 calories/day between adjacent levels — instead of just outputting a number with no context.
Teacher Classroom Supply Spending & Tax Deduction Tracker
Enter what you actually spent on classroom supplies this year and see exactly how much the federal Educator Expense Deduction covers ($300 for 2025 returns, $350 starting with 2026) -- and how much comes straight out of your own pocket.
Temple Dash
Switch lanes to dodge barriers and jump over the ones that block every lane — how far can you run?
Text Diff Checker
Compare two blocks of text and see exactly what changed — line by line and word by word — updating live as you type, with no monthly limits or signup.
Text Glitch Effect Generator
Free CSS glitch text generator with three effect types (RGB-split color, noise, transform), adjustable intensity and speed, and one-click code copy — a popular competitor (CSS Portal) has no copy button and no speed/intensity control at all. It also respects accessibility: toggle 'Reduce motion' to preview the static look, and every copied snippet includes its own prefers-reduced-motion media query, which we checked and found missing from every competitor we reviewed.
Text to Handwriting Converter
Turn typed text into a realistic handwriting image — pick a style, paper, and ink color, with no watermark and no cutoff on long text.
Thanksgiving Dinner Cost Calculator
Estimate your Thanksgiving grocery bill for any group size using the American Farm Bureau Federation's latest published survey, by U.S. region, and see how it compares with your own budget.
Thanksgiving Food Quantity Planner and Shopping List
Enter how many adults and children you are feeding to get the turkey size, side-dish amounts, rolls, pies and a copyable shopping list, with every ratio sourced to Extension, Whole Foods Market or TODAY.
Thanksgiving Plate Calorie Estimator
Build your Thanksgiving plate dish by dish, with half-servings, and see an estimated calorie total from USDA FoodData Central values, without any guilt trip.
TikTok Creator Rewards Eligibility Checker
Check your TikTok Creator Rewards Program eligibility against the official 2026 requirements — followers, 30-day views, age, region, and account standing — with an instant checklist instead of a long guide article.
Tile Calculator
Free tile calculator that accounts for grout spacing — enter your room and tile dimensions and get the exact tile count (and box count, if you know tiles-per-box), not just room area divided by tile area.
Time Calculator
Free time calculator with two modes: combine two durations (days, hours, minutes, seconds) with add/subtract, or apply a duration to a specific date and time.
Time Card Calculator
Free weekly time card calculator — enter start/end times and a break for each day of the week and get your total hours (and total pay, if you enter an hourly rate) instantly.
Time Duration Calculator
Free time duration calculator that finds the exact elapsed time between two specific moments — down to the second, including both the date and time of day.
Time Zone Calculator
Free time zone calculator that converts a date and time from one time zone to another, using your browser's built-in time zone database — daylight saving time is handled automatically for the date you pick.
Tip Calculator
Free tip calculator with bill splitting — enter the subtotal, tax, and tip percent, choose whether tax counts toward the tip, and split the total across any number of people.
Tire Size Calculator
Free tire size calculator — compare an original and replacement tire size to see the diameter difference and how much it will throw off your speedometer.
Tool Invaders
Shoot down waves of tool-icon invaders before their formation reaches your ship — and watch for the ones that peel off and dive straight at you. 3 lives, endless waves.
Trick-or-Treat Sunset & Hours Calculator
Halloween 2026 falls on Saturday, October 31 -- the first Saturday Halloween since 2020. Pick a major US city (or enter your own latitude) to estimate that day's sunset time and a suggested trick-or-treat window, based on the general pattern of starting near sunset and running 2-3 hours. This is a general estimate, not your town's official posted hours -- many towns set exact hours by local ordinance, so check your town or city's own announcement too.
Trump Account Planner: Eligibility and Growth Illustration
Check whether a child is eligible for a Trump Account and the $1,000 Treasury pilot deposit, then see a transparent growth illustration under low, medium and high return assumptions, with the $5,000 yearly cap built in.
Turkey Brine & Roasting Time Calculator
Free turkey calculator — weight-tiered roasting time by method (roast, spatchcock, deep-fry, stuffed or not) based on USDA FSIS guidance, plus dry vs wet brine salt and water ratios, in one place.
Tweet to Image Converter
Turn any tweet text into a polished, shareable image card with gradient backgrounds — no watermark, no login, and no fragile URL scraping.
Twitch Panel Maker
Build a Twitch info panel (About, Schedule, Rules, Donate, Discord, Socials) at Twitch's recommended 320x300 size and download it as PNG — every feature free, no watermark, no subscription.
Twitter/X Ad Revenue Calculator (For Fun)
A just-for-fun estimator that turns your monthly impressions into a ballpark X (Twitter) ad revenue range — not a financial prediction, and not investment or tax advice.
Typing Speed Test
Type a real sentence (with punctuation, not just a word list) and get your WPM and accuracy together, with every mistyped character highlighted — so you know exactly what's slowing you down.
ULID Generator
Generate up to 1000 ULIDs at once with the embedded timestamp shown next to each one — no separate decode page — plus ULID-to-UUID and UUID-to-ULID conversion on the same screen.
Unit Conversion Calculator
Free general-purpose unit converter covering length, weight/mass, volume, area, speed, and temperature — pick a category, pick from/to units, and get the result instantly.
Unix Timestamp Converter
Convert Unix timestamps to dates and back, live as you type, with a timezone picker and a running current-timestamp display.
Unused PTO Value Calculator
Enter your pay and how many PTO days you have left, and see exactly what that unused time off is worth in dollars -- plus a live countdown to year-end if your plan doesn't roll over.
URL Encoder/Decoder
Encode or decode URLs and query parameters live as you type — choose between component and full-URL encoding, with a clear message instead of a crash on malformed input.
URL Parser
Break down any URL into protocol, credentials, hostname (with Unicode alongside punycode for international domains), port, path, hash, and every query parameter — including every occurrence of a repeated key, not just the last one.
User-Agent Parser
Break a User-Agent string down into browser, engine, OS, and device type — and get flagged when it matches Chrome's frozen mobile pattern ("Android 10; K"), so a fixed placeholder value isn't mistaken for the device's real OS version or model.
UUID v4 Generator
Generate cryptographically random UUID v4 values, one or up to 100 at once, with uppercase and no-hyphen format options.
VA Mortgage Calculator
Free VA mortgage calculator with the actual 2026 VA funding fee schedule — first-time vs. subsequent use, tiered by down payment percentage, plus a disability exemption toggle.
VAT Calculator
Free VAT calculator with real 2026 standard rates for all EU countries, the UK, Norway, and Switzerland — add VAT to a net price or remove it from a gross price, or use a custom rate.
Vegetarian/Vegan Diet Grocery Savings Calculator
See your estimated annual grocery savings from switching to a vegan or vegetarian diet, based on PCRM's peer-reviewed study finding a 19% ($650+/year) grocery cost reduction on a low-fat vegan diet vs. the standard American diet.
Veterans Day Discount Value Estimator
Check off the Veterans Day (Nov 11, 2026) restaurant and retail offers that apply to you and see the total dollar value you could claim — built because reporting shows veterans use under 30% of available discounts, mostly from not knowing they exist.
Vitamin D Dosage Calculator
Free vitamin D dosage calculator using IOM (National Academies) RDA and UL figures, plus Endocrine Society guidance for confirmed deficiency — see your recommended daily intake by age, and how it changes if a blood test has confirmed you're deficient.
Voltage Drop Calculator
Free voltage drop calculator for a wire run — enter the gauge, length, current, and system type, and see the voltage drop, percent drop, and voltage at the load, with a warning if it exceeds the commonly recommended 5% maximum.
Wedding Budget Calculator
Enter your total wedding budget to see it automatically split across 10 standard categories (venue & catering, photography, attire, flowers, and more) using The Knot's 2026 percentage guidelines. No email, no signup — just your numbers, instantly.
Wedding Seating Chart Template
Plan your reception seating without an account: paste your guest list, add tables with a seat count, and assign guests to each table. The tool warns when a table is over capacity, when a guest is seated twice, and lists everyone not yet seated. Print or save a chart of tables plus an alphabetical "find your table" list as a PDF. Nothing is uploaded.
Whack the Tools
Tools pop up out of their holes for a split second — click or tap them before they duck back down. 20 seconds, as many whacks as you can land.
WhatsApp Chat Mockup Generator
Create a realistic fake WhatsApp conversation — green sent bubbles, sent/delivered/read checkmarks, and a contact status bar — for mockups, memes, or presentations. Free, no watermark.
Whitespace & Line Break Remover
Clean up messy text — collapse repeated spaces, convert tabs, strip line breaks without gluing words together, and remove empty lines, all with live toggles.
Wind Chill Calculator
Free wind chill calculator using the official US National Weather Service / Environment Canada formula — enter temperature and wind speed to see the "feels like" temperature.
Winter Heating Cost Estimator
Estimate your seasonal heating bill by fuel type — natural gas, electricity, propane or heating oil — using the forecast November-March average prices from the EIA Winter Fuels Outlook 2026-27 (published October 6, 2026) and your own usage.
Word Counter for Social Media
Count characters, words, sentences, and paragraphs in real time, and preview how your text actually looks as a Twitter/X post, a Google search snippet, or an Instagram caption — with each platform's logo right on the preview so you know exactly which limit you're checking.
Word Guess
Guess the hidden 5-letter word in 6 tries — green means the right letter in the right spot, yellow means it's in the word but the wrong spot.
YAML to JSON Converter
Paste YAML and get JSON instantly — anchors and aliases are fully resolved (not left as an unsupported error), and a tab-character indentation mistake is pointed out by exact line number instead of a cryptic parser message.
Year-End Bonus Tax Withholding Calculator
Free year-end bonus tax withholding calculator built for employees, not payroll admins — enter your bonus amount to see the 22%/37% flat federal withholding split at the $1M threshold, with a clear reminder that withholding isn't your final tax bill.
Year-End Charitable Giving Tax Deduction Calculator (2026 Rules)
Estimate how much federal tax your 2026 cash gifts to charity could save under the new rules: the $1,000/$2,000 non-itemizer deduction, the 0.5%-of-AGI floor for itemizers, and the 35% value cap for the top bracket.
YouTube Shorts Monetization Eligibility Checker
Check your YouTube Partner Program eligibility for both 2026 monetization tiers — Fan Funding (500 subs) and Full ad revenue (1,000 subs) — against your actual subscribers, uploads, Shorts views, and watch hours, plus an estimated Shorts earnings range.
YouTube Thumbnail Downloader
Paste a YouTube URL to see and download every thumbnail resolution that actually exists for that video — missing sizes are shown as "not available" instead of a broken image, since not every video has a maxresdefault.