Bcrypt Hash Generator and Verifier

Hash a password with bcrypt, or check a password against an existing hash. Nothing sent.

Stays on your device. This tool runs in your browser — nothing you paste or open ever leaves it. Nothing uploaded, nothing to leak.

Mode

Password

Cost factor —

Existing hash

Hashed in your browser · never sent

Result

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How to use it

In Generate, type the password and choose a cost factor, then generate — you get a 60-character hash starting with $2b$ or $2y$, ready to paste into a database or config. In Verify, paste an existing hash and the password you want to test; it tells you whether they match. Verifying reads the cost and salt straight out of the hash, so you do not need to know them.

Bcrypt Generator — TechWhack Score

9/10

Privacy 10/10

Hashing and verification run in your browser — the password never leaves the device.
Speed 8/10

Fast at normal cost factors; a high cost is deliberately slow, which is the algorithm doing its job.
Features 8/10

Generate with an adjustable cost factor, or verify a password against an existing hash — the salt and cost are read from the hash itself.
Free 10/10

No sign-up, no limit, embeddable.

Verdict: Verifying against an existing hash is the half most generators skip, and it is the half you need when debugging a login.

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A bcrypt generator turns a password into a salted bcrypt hash of the kind you store in a database, and verifies a password against a hash you already have. Pick the cost factor — how much work each hash takes — then generate or verify. Both run in your browser, so the password never leaves your device.

Choosing a cost factor

The cost factor is a power of two: each step up doubles the work. Ten to fourteen is the usual recommendation, with twelve a common default. Higher is more resistant to offline cracking but slower for every legitimate login too, so pick the highest value your server can absorb at your login rate — and note that a high cost will take a noticeable moment in the browser here, which is the algorithm working as designed.

Why bcrypt rather than a plain hash

MD5 and SHA are built to be fast, which is exactly wrong for passwords — an attacker with a stolen database can try billions per second. Bcrypt is deliberately slow and salts every hash automatically, so identical passwords produce different hashes and precomputed rainbow tables are useless.

FAQ

Is the password sent anywhere?No — hashing and verification happen in your browser. The password is never transmitted or stored.

What cost factor should I use?Ten to fourteen for most applications; twelve is a sensible default. Higher costs are slower to crack but also slower on every login.

Why is my hash different every time?Bcrypt generates a random salt for each hash, so the same password produces a different hash every run. Verifying still works, because the salt is stored inside the hash.