Bcrypt is a battle-tested password-hashing algorithm that adds a random salt and an adjustable cost factor, making stored hashes resistant to brute-force and rainbow-table attacks.

It controls how computationally expensive the hash is to generate — higher rounds make hashing (and cracking attempts) slower, increasing security at the cost of speed.

Yes — switch to verify mode, enter the password and the existing hash, and the tool instantly tells you whether they match.

No — hashing and verification run locally in your browser, so your plaintext passwords and generated hashes never leave your device.

Bcrypt automatically generates a new random salt for every hash, so identical passwords produce different hashes — this is intentional and improves security.