Free Bcrypt Hash Generator — Generate and Verify bcrypt Password Hashes

Our free bcrypt hash generator creates secure bcrypt password hashes and verifies passwords against existing hashes entirely in your browser using bcrypt.js. Passwords never leave your device. Use this for testing password hashing implementations, understanding cost factors and verifying database entries.

Why Bcrypt for Password Storage?

Bcrypt is specifically designed for password hashing. Unlike MD5 or SHA, it is intentionally slow, includes a random salt (preventing rainbow table attacks) and has an adjustable cost factor that can be increased as hardware improves. OWASP recommends bcrypt with cost factor 10 as a minimum for new applications.

Choosing the Right Cost Factor

• 4–6 — Testing only. Far too fast for production.
• 10–12 — OWASP recommended for most applications.
• 13–14 — High security. Noticeable login delay (~1–2 seconds).

Never Use MD5 or SHA for Passwords

MD5, SHA-1 and even SHA-256 are general-purpose hash functions — they are far too fast for password storage. A modern GPU can compute billions of SHA-256 hashes per second, making brute-force attacks trivial. Bcrypt, Argon2 and scrypt are purpose-built to be slow and memory-intensive, making GPU attacks impractical.