About OllTools

What OllTools is

OllTools is a growing collection of free, single-purpose web tools — calculators, converters, generators, and templates. Every tool on this site works two ways: on its own, as a complete tool for one specific task, or combined with another tool to skip a step you’d otherwise do by hand across two different sites.

We call each tool a “cube.” A cube does one thing well, loads fast, and — wherever the task allows — runs entirely in your browser. No account, no file upload to a server you have to trust, no waiting.

Why we build it this way

Most of what people search for when they land on a tool page is simple: convert this file, calculate this number, generate this code. We think the fastest path to that answer is the best product, so every OllTools page puts the tool itself first, not a marketing pitch.

We’re adding new tools continuously. If there’s a tool you’d like to see, contact us — we read every suggestion.

How our tools work

Client-side first. Text, calculator, and most generator tools process entirely in your browser. Nothing you type is sent to our servers.
Server processing only when necessary. A small number of tools (for example, ones that look up public company or market data) fetch data through our server because the source doesn’t allow direct browser requests — no personal data is stored. We disclose this on the relevant tool page.
No professional advice. Our calculators use standard, publicly documented formulas. They’re built for quick estimates, not professional financial, medical, legal, or tax guidance. See our Disclaimer for details.

Who runs this site

OllTools is operated by LastMile Co. (CEO: Oh Chi-hyun), a business registered in the Republic of Korea (Business Registration No. 282-20-02613). You can reach us at lastmile.work@gmail.com or via our Contact page.

Questions or feedback

We’d like to hear from you — whether it’s a bug report, a tool request, or feedback on something that didn’t work the way you expected. Visit our Contact page to reach us.

Business information

Company: LastMile Co.
CEO: Oh Chi-hyun
Business Registration No.: 282-20-02613
E-Commerce License: 2026-Incheon Gyeyang-0337
Address: 203-S56, 2F, 91 Ojosan-ro, Gyeyang-gu, Incheon, Republic of Korea
Email: lastmile.work@gmail.com
Phone: +82-10-2839-3996