What makes Bcrypt secure?

Bcrypt is an adaptive key derivation function based on the Blowfish cipher. It incorporates a salt to protect against rainbow table attacks and has an adjustable work factor (rounds) to make it computationally expensive and slow down brute-force attempts.

Why is hashing slower for higher salt rounds?

The salt round number represents the exponential work factor (2^rounds). For example, 12 rounds is 4 times slower than 10 rounds, making hashes more secure but requiring more client computation time.

Bcrypt Password Hasher & Verifier

Generate cryptographically secure adaptive Bcrypt password hashes and check plain text string matches locally.

Bcrypt Hash Generator

Plain Password / Text

Salt Rounds (Work Factor)

Click Generate to compute hash...

Bcrypt Hash Verifier

Plain Password / Text

Bcrypt Hash

Untested (Fill credentials)

Frequently Asked Questions

What does the $2a$ or $2b$ prefix mean?

These prefixes represent different versions of the Bcrypt algorithm. The $2a$ prefix is the original OpenBSD format, and $2b$ is a minor revision designed to handle special padding overflows correctly. They are functionally identical for modern usages.

Why does hashing take time?

Bcrypt is intentionally slow by design. It uses a Work Factor (rounds) to run multiple iterations of key derivation. This prevents attackers from executing bulk brute-force or dictionary attempts on databases.

Is Bcrypt irreversible?

Yes, Bcrypt is a one-way cryptographic hashing function. You cannot de-hash or decrypt the string. To check credentials, you must hash the incoming plain text with the same salt and compare the results (handled locally in our verifier panel).

Is my password secure here?

Yes. All computations take place inside your browser. No strings, salts, or generated hashes are sent over the Internet, making it safe for developer use.