bcrypt Generator
Generate and verify bcrypt password hashes. Industry-standard hashing for secure password storage.
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Frequently Asked Questions
Why should I use bcrypt instead of regular hashing?
bcrypt was designed specifically for password storage with built-in protections against rainbow table attacks through salting. It uses a configurable cost factor that makes hashing computationally expensive, which slows down brute-force attacks without significantly impacting normal login times.
What is the cost factor and what value should I use?
The cost factor determines how computationally expensive the hashing operation is. Higher values mean more processing time for both legitimate users and attackers. A cost factor of 10-12 is typically recommended for most applications, balancing security with user experience. Adjust based on your server capabilities.
Can I verify passwords against existing hashes?
Yes. Enter your password followed by verify: and the hash string. The format is password||verify:$2y$10$... The tool will return whether the password matches the stored hash, useful for testing existing password databases.
Is bcrypt more secure than SHA-256 for passwords?
Yes. SHA-256 and similar general-purpose hash functions are designed for speed, making them vulnerable to rapid guessing attacks. bcrypt is intentionally slow and includes salting. For password storage, always use bcrypt, Argon2, or similar adaptive hash functions.
Is my data sent to a server?
No. All hashing and verification happens locally in your browser using a pure JavaScript bcrypt implementation. Your passwords and data never leave your device.
What do the dollar signs in bcrypt hashes mean?
A bcrypt hash like $2y$10$... contains version ($2y$), cost factor (10), and the salt followed by the hash (24 base64 characters each). The 22-character salt is randomly generated for each hash, ensuring identical passwords produce different hashes.