Bcrypt Hash Generator & Verifier
Generate and verify bcrypt password hashes in your browser. Simplified bcrypt demonstration with configurable cost factor. Free online tool — no server required.
Frequently Asked Questions
What is bcrypt?
Bcrypt is a password hashing function based on the Blowfish cipher. It includes a built-in salt and a configurable cost factor that makes it intentionally slow, protecting against brute-force attacks. It is one of the most recommended algorithms for password storage.
Why is bcrypt better than SHA-256 for passwords?
Bcrypt is designed to be slow and includes a configurable cost factor. SHA-256 is designed to be fast, which makes it vulnerable to brute-force attacks on passwords. Bcrypt's intentional slowness means an attacker needs significantly more time per guess.
Is this a real bcrypt implementation?
This is a simplified demonstration of the bcrypt concept running in JavaScript. For production password hashing, use a server-side bcrypt library (like bcrypt in Node.js or Python). Real bcrypt is computationally intensive and best handled server-side.
What cost factor should I use for bcrypt?
A cost factor of 10-12 is common for most applications. Each increment doubles the computation time. Factor 10 takes roughly 100ms, factor 12 takes roughly 400ms. Choose a value that provides acceptable login latency while maximizing security.
Is this tool free?
Yes. All KappaKit tools are free, run in your browser, and require no signup or account.