Hash passwords with bcrypt and verify them — everything runs in your browser.
Bcrypt Hash Generator is a free online tool that hashes passwords using the bcrypt algorithm and verifies existing bcrypt hashes. Bcrypt is the industry standard for password hashing, designed specifically to be slow and resistant to brute-force attacks. Unlike simple hash functions like MD5 or SHA-256, bcrypt incorporates a salt (random data added to the password) and a configurable cost factor that controls how computationally expensive the hashing process is. Higher cost rounds make the hash slower to compute, which directly increases the time needed for brute-force attacks. The tool allows you to choose the cost factor (work rounds) from 4 to 16. A cost of 10 is the common default, taking approximately 100ms to compute. Each increment doubles the computation time. The verification feature lets you check if a plaintext password matches an existing bcrypt hash. Everything runs entirely in your browser. Your passwords are never sent to any server, never stored, and never logged. This is essential for a password hashing tool — your plaintext passwords must remain completely private. There are no usage limits and no account required. Common use cases include generating bcrypt hashes for user registration systems, verifying passwords against stored hashes, testing bcrypt implementations, migrating password storage from weaker algorithms, and generating hashes for configuration files. For simpler hash algorithms (MD5, SHA-256), use the Hash Generator. For creating strong random passwords to hash, try the Password Generator.