Bcrypt Hash Generator

The Bcrypt Hash Generator creates bcrypt password hashes using the Blowfish cipher-based hashing algorithm with configurable cost factors (4 to 16). Bcrypt was designed specifically for password storage — it is intentionally slow and includes automatic salting to resist brute-force and rainbow table attacks. Each increase in cost factor doubles the computation time, making bcrypt future-proof against faster hardware. All hashing runs locally in your browser using a pure-JavaScript bcrypt implementation — passwords are never transmitted.

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How to Use

Enter a password in the input field and select a cost factor (rounds) between 4 and 16 — cost factor 12 is recommended for production use. Click Generate to produce the bcrypt hash string, which includes the algorithm identifier, cost factor, 16-byte salt, and 23-byte hash. Use the Verify tab to test whether a plaintext password matches a stored bcrypt hash.

Common Use Cases

• •Generating bcrypt password hashes for database seeding scripts and user account fixture data during backend development
• •Verifying that a user's entered password matches a bcrypt hash stored in PostgreSQL, MySQL, or MongoDB user records
• •Benchmarking different cost factors (10, 11, 12) to find the optimal security-performance balance for your server hardware
• •Creating pre-hashed admin passwords for database migration scripts and infrastructure-as-code bootstrap files
• •Cross-verifying bcrypt output between PHP password_hash(), Node.js bcrypt, and Python bcrypt libraries for compatibility testing

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