Bcrypt Generator
Generate and verify Bcrypt hashes
Note: This is a client-side PBKDF2-based approximation of bcrypt behavior. For production use, always use server-side bcrypt implementations (e.g., bcrypt.js, bcrypt library). Real bcrypt uses Blowfish cipher and proper salt generation.
Frequently Asked Questions
What is Bcrypt?
Bcrypt is a password hashing algorithm that includes salt and adjustable cost, being resistant to brute force attacks.
What is cost (salt rounds)?
It's the work factor. Each increase doubles calculation time. Recommended: 10-12.
Why use Bcrypt?
Bcrypt is slow by design, making brute force attacks much harder than MD5 or SHA.
What is the ideal cost (salt rounds) for production?
For production, use cost 10-12. Cost 10 takes ~100ms, cost 12 takes ~300ms. Above 12, the time may impact user experience during login. Adjust according to your server capacity.
Bcrypt vs Argon2 — which is better?
Argon2 is more modern and resistant to GPU attacks, being the winner of the Password Hashing Competition (2015). Bcrypt is still widely supported and secure. For new projects, Argon2id is recommended; for legacy, Bcrypt is excellent.