Bcrypt Generator
Hash a password with bcrypt and verify a password against a hash — entirely in your browser. Adjustable cost. Free.
Generate a bcrypt hash
Hash a password with bcrypt. Everything runs in your browser — nothing is sent anywhere.
Verify a password against a hash
Check whether a password matches an existing bcrypt hash.
What this bcrypt generator does
Common use cases
- 1Creating a password hash to store
- 2Verifying a login hash
- 3Seeding a test user
- 4Comparing two rounds settings
- 5Learning how bcrypt works
- 6Rotating a stored password
Related tools
About bcrypt
bcrypt is the standard for storing passwords. Unlike a plain hash, it is salted (so identical passwords get different hashes) and deliberately slow — the cost factor (rounds) makes brute-forcing expensive. Higher rounds are more secure but slower.
This tool generates and verifies bcrypt hashes entirely in your browser, so your plaintext password is never transmitted. Store only the hash, never the password, and choose a cost of 10–12 for a good balance of security and speed.
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Got Questions? We Have Answers.
Is my password sent anywhere?
No. Both hashing and verification run in your browser with bcryptjs, so your plaintext password is never transmitted.
What cost should I use?
A cost (rounds) of 10 to 12 is a good balance of security and speed for most applications. Higher is slower but harder to brute-force.
Why is bcrypt better than a hash?
It is salted (identical passwords get different hashes) and deliberately slow, which makes brute-forcing expensive — unlike a plain MD5 or SHA hash.
Can it verify a hash?
Yes. Paste a password and an existing bcrypt hash and the tool tells you whether they match.