Bcrypt Hash Generator
Generate and verify bcrypt hashes online. Free bcrypt password hash generator with configurable cost rounds.
Generate Hash
Processed locally in your browser.
Verify Hash
What is Bcrypt Hash Generator?
Bcrypt is a password hashing function designed specifically for securely storing passwords. Unlike simple hash functions (MD5, SHA), bcrypt incorporates a salt and a cost factor that makes brute-force attacks computationally expensive. The cost factor (rounds) determines how many iterations are performed — higher values are slower but more secure. A typical bcrypt hash looks like $2b$12$randomsalt22characters+hash31characters.
How to Use
- In Hash mode: enter a password and set the cost rounds (default 12, range 4-31)
- Click Generate Hash to create a bcrypt hash of your password
- In Verify mode: enter a password and its bcrypt hash to check if they match
- Copy the generated hash using the copy button
Examples
Hash a password
Verify a password
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Frequently Asked Questions
What cost rounds should I use?
Rounds 10-12 is the current recommended range. Each increment doubles the computation time. Rounds 10 takes about 100ms, rounds 12 about 400ms, rounds 14 about 1.5 seconds. Choose the highest value your server can tolerate during login.
Why use bcrypt instead of SHA-256 for passwords?
SHA-256 is fast, which makes it bad for passwords — attackers can try billions of guesses per second. Bcrypt is intentionally slow and adapts to hardware improvements via the cost factor. It also automatically handles salting to prevent rainbow table attacks.
Is this safe for production use?
Yes. Hashing happens entirely in your browser using a JavaScript bcrypt implementation. For maximum security, you can also generate hashes offline. The generated hashes are standard bcrypt format compatible with all major backend frameworks.