Bcrypt Hash Generator
Generate bcrypt hashes for passwords and verify bcrypt hashes online. Bcrypt is the gold standard for password storage — it is intentionally slow (to resist brute-force attacks), includes a built-in salt (to prevent rainbow table attacks), and is adjustable in cost factor. Use this tool to understand bcrypt, test your authentication systems, or hash passwords for development. All processing is client-side.
Bcrypt Hash Generator
Generate and verify bcrypt password hashes. All processing is client-side.
Generate Hash
Verify Hash
How to Use Bcrypt Hash Generator
- 1Enter the plaintext password to hash
- 2Select the cost factor (10-14 recommended)
- 3Click Hash to generate the bcrypt hash
- 4To verify, enter both the password and hash, then click Verify
About Bcrypt Hash Generator
Generate bcrypt hashes for passwords and verify bcrypt hashes online. Bcrypt is the gold standard for password storage — it is intentionally slow (to resist brute-force attacks), includes a built-in salt (to prevent rainbow table attacks), and is adjustable in cost factor. Use this tool to understand bcrypt, test your authentication systems, or hash passwords for development. All processing is client-side.
Your Privacy is Protected
Bcrypt Hash Generator runs entirely in your browser. Your files and data are never uploaded to any server, never stored, and never shared. Everything happens locally on your device using secure browser APIs.
Frequently Asked Questions
What is bcrypt?
Bcrypt is a password hashing function designed specifically for password storage. Unlike MD5 or SHA-256, bcrypt is intentionally slow and includes a salt, making it ideal for storing user passwords.
What cost factor should I use?
A cost factor of 10-12 is standard. Higher values are more secure but take longer to compute. Factor 12 takes about 250ms — acceptable for authentication, too slow for brute force.
Can bcrypt hashes be reversed to get the original password?
No. Bcrypt is a one-way hash function — it is computationally infeasible to reverse a bcrypt hash to get the original password. Verification works by hashing the input again and comparing the result, not by decrypting.
Why is bcrypt better than MD5 or SHA for passwords?
MD5 and SHA are designed to be fast, making them easy to brute-force. Bcrypt is designed to be slow and includes a built-in random salt, which means even identical passwords produce different hashes and rainbow tables are useless.
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