bcrypt Hash Generator
100% client-side — hashing runs through the bcryptjs library in your browser. Nothing is ever transmitted.
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.
How it works
- Type a password and adjust the cost factor (rounds) — higher is slower but more secure
- The bcrypt hash updates live below, no server involved
- Switch to the Verify tab to check a password against an existing bcrypt hash
Frequently asked questions
Is my password sent to a server?
No — hashing runs through the bcryptjs library entirely in your browser. Nothing is ever transmitted.
What cost factor should I use?
10-12 is a reasonable minimum for production use. Higher values are more secure but take longer to compute.
Does bcrypt handle very long passwords?
Not fully — bcrypt silently ignores anything past 72 bytes, which can weaken very long or multi-byte passwords. This tool warns you when your input exceeds that limit.
Related tools
From the blog
Passkeys Just Passed 5 Billion — But Most Accounts Still Run on Passwords
Passkey sign-ins now succeed 93% of the time versus 63% for passwords, and global adoption has crossed 5 billion. But 87% of organizations still use passwords for customer logins — here's why passwords aren't going away yet, and how to make the ones you still use stronger.
2026-09-04
One bcrypt tool processes your actual password on its server. And bcrypt itself silently drops anything past 72 bytes — nobody we checked warns about it.
We checked a popular bcrypt generator directly: it states outright that hashing happens server-side, meaning your real password gets sent over the network. Separately, bcrypt has a well-documented 72-byte limit that silently truncates long or multi-byte passwords — no tool we found flags it. Ours does both right.
2026-08-29Update history
- 2026-08-30 Added: a cover image — used as the card thumbnail, social share image, and blog title image.
- 2026-08-29 Launched: live bcrypt hashing with adjustable cost factor, password verification against an existing hash, 72-byte truncation warning. Uses the bcryptjs library (pure JS, no server) since a hand-rolled bcrypt risks incompatibility with real implementations.