Bcrypt Hash Generator
Generate highly secure Bcrypt password hashes instantly. Processed completely in your browser.
What is Bcrypt?
Bcrypt is a password hashing function designed by Niels Provos and David Mazières, based on the Blowfish cipher. Introduced in 1999, it incorporates a salt to protect against rainbow table attacks and is an adaptive function. Over time, as hardware becomes faster, the iteration count (or "work factor") can be increased to make it slower, thus continuing to resist brute-force search attacks.
Why use Salt Rounds?
The "salt rounds" or "work factor" determines how computationally expensive it is to calculate a single Bcrypt hash. A higher number of rounds means the algorithm iterates more times, taking longer to generate a hash. While this makes it slightly slower for legitimate users logging in, it makes brute-forcing a stolen database exponentially more time-consuming for attackers. A value of 10 or 12 is generally recommended for modern applications.
Bcrypt vs MD5 and SHA-1
Unlike MD5 and SHA-1 which are general-purpose cryptographic hashes, Bcrypt is specifically designed for hashing passwords. General purpose hashes are optimized to be as fast as possible, which is a disadvantage for password hashing as it allows attackers to test billions of guesses per second. Bcrypt's intentional slowness is its strongest security feature.