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Bcrypt Hash Generator

Hash a password with bcrypt at a configurable cost factor — the right way to store passwords.

To hash a password with bcrypt, enter it above and choose a cost factor. Bcrypt is deliberately slow and automatically salts every hash, so identical passwords produce different results and brute-force attacks stay expensive even with modern hardware.

Runs in your browser
Privacy
Runs entirely in your browser — nothing is uploaded
Cost
Free, unlimited, no sign-up

Frequently asked questions

Why does the same password give a different hash each time?

Bcrypt generates a new random salt for every hash and stores it in the output. This defeats rainbow tables — the same password produces a different hash for every user.

What cost factor should I use?

Pick the highest value where hashing still takes under about 250 ms on your production hardware. In 2026 that is typically 12 or 13 for a server, and the tool shows the measured time for each setting.

How to use the bcrypt hash generator

  1. 1Enter or paste your password.
  2. 2Set the cost factor.
  3. 3Press Run, then download the result when it is ready.

Embed this tool

Put the working bcrypt hash generator on your own site. It runs in your visitors' browsers exactly as it does here — free, no account, nothing uploaded.

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