Bcrypt Hash Generator & Verifier — Free Online

How to use

1. Enter Password — Type the password you want to hash.
2. Choose Cost — Higher cost = slower but harder to brute-force (10–12 recommended).
3. Generate or Verify — Generate a bcrypt hash, or verify an existing hash against a password.

Free Online Bcrypt Hash Generator & Verifier

Generate bcrypt password hashes and verify existing hashes against plaintext passwords — entirely in your browser. Bcrypt is the industry-standard algorithm for password storage in Laravel, Rails, Django, Node.js, and most modern auth systems.

How Bcrypt Works

Bcrypt combines three things into a single hash string: an algorithm identifier, a cost factor (work factor), and a 22-character random salt. The full output looks like $2b$10$N9qo8uLOickgx.... The cost factor doubles the work per password each step, making the algorithm "future-proof" against faster hardware.

Choosing the Right Cost Factor

• Cost 10: ~100 ms on modern hardware. Default for most frameworks.
• Cost 11: ~200 ms. Good middle ground.
• Cost 12: ~400 ms. Recommended for high-value accounts.
• Cost 13+: Use only if your hardware can keep login latency under 1 second.

Verifying Existing Hashes

The verifier takes a bcrypt hash and a plaintext password, then runs bcrypt.compare to check whether they match. This is exactly how login systems validate user input — without ever decrypting the stored hash.

Security Notes

• Never log, transmit, or store plaintext passwords. Bcrypt only protects them once hashed.
• Use the same cost factor across your app so hashes can be re-used after migration.
• Re-hash with a higher cost factor when users next log in if you upgrade your work factor.

Related: SHA-256 Generator, Password Generator, Password Strength.

Frequently asked questions

What is bcrypt?

Bcrypt is a password-hashing function based on the Blowfish cipher. It includes a built-in salt and an adjustable cost factor that slows down brute-force attacks as hardware gets faster.

What cost factor should I use?

10 is a sensible default. 12 is stronger but ~4× slower. For high-value targets, choose the highest cost your server can handle without harming login latency (typically <250 ms).

Why are two hashes of the same password different?

Bcrypt generates a unique random salt for each hash. Different salts produce different outputs even for identical passwords — and that's the whole point.

Should I use bcrypt for fast hashing like file checksums?

No. Bcrypt is intentionally slow. For file integrity use SHA-256 or SHA-512 instead.

Is the password sent to a server?

No. Hashing and verification run entirely in your browser using bcryptjs.

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