Security ToolsFree

Bcrypt Generator

Hash passwords using the bcrypt algorithm with a configurable cost factor (work rounds). Verify bcrypt hashes against plain text. Uses the bcryptjs library entirely in-browser — no server, no signup. Essential for developers testing authentication systems.

Verify password against hash

Frequently Asked Questions

What cost factor (work factor) should I use for bcrypt?▼
Cost factor 10 is the standard recommendation for most web applications. Cost 12 is more secure but adds noticeable latency on login. Cost factors above 14 are typically only needed for high-security applications.
Can I verify an existing bcrypt hash?▼
Yes. Enter the plain text password and the bcrypt hash to verify whether they match. This is useful for debugging authentication code.
Why use bcrypt instead of MD5 or SHA-256 for passwords?▼
MD5 and SHA-256 are fast hashing algorithms — a GPU can test billions per second. Bcrypt is intentionally slow (adjustable via the cost factor), making brute-force attacks computationally infeasible.
Is bcrypt processing done in the browser?▼
Yes. The bcryptjs JavaScript library handles all hashing in your browser. No data is sent to any server.
What is bcrypt salt?▼
Bcrypt automatically generates a unique random salt for each hash. Two hashes of the same password will be different — this prevents rainbow table attacks.