How it works
How Bcrypt Password Hashing Works
Use this free Bcrypt hash generator and verifier to create cryptographically secure password hashes directly in your browser. The tool supports configurable cost factors from 4 to 15 rounds, lets you benchmark hashing performance on your device, and provides a full verification workflow for testing plaintext passwords against existing Bcrypt hashes.
Bcrypt is a password-hashing function designed to be slow and computationally expensive, making brute-force attacks significantly harder. Unlike fast hash functions like SHA-256, Bcrypt incorporates a salt automatically and uses a cost factor that exponentially increases the time required to compute each hash. This page lets you experiment with different cost levels, see how they perform on your hardware, and choose the right balance between security and response time for your application.
The tool also parses Bcrypt hash strings to show their internal structure: the version prefix, cost rounds, salt section, and hash payload. This is useful for understanding existing hashes stored in databases, verifying that your system is using the expected cost factor, or debugging password migration workflows.
Everything runs locally. Your passwords and hashes never leave your browser. Use the generated values in your registration, login, or password-reset systems, and always confirm security-critical implementations against your backend framework documentation.