Bcrypt Hash Generator and Verifier

Bcrypt is one of the most trusted password hashing algorithms in use today, designed specifically to be slow and resistant to brute-force attacks. The Bcrypt Hash Generator and Verifier lets you create bcrypt hashes from any password with configurable cost rounds, and verify whether a plaintext password matches an existing bcrypt hash.

Unlike fast hash functions such as MD5 or SHA-256, bcrypt incorporates a work factor (cost rounds) that makes each hash computation intentionally expensive. Increasing the cost by one doubles the computation time, allowing you to scale security as hardware improves. A cost factor of 10-12 is typical for most applications, while 14 or higher provides extra protection for sensitive systems. Bcrypt also automatically generates and embeds a random salt, preventing rainbow table attacks.

All hashing and verification runs entirely in your browser - no passwords or hashes are transmitted to any server. This tool is ideal for developers testing authentication systems, generating hashes for configuration files, or verifying stored hashes during debugging. The output follows the standard bcrypt format with the algorithm identifier, cost factor, salt, and hash all encoded in a single string.