Password hash generator
Generate bcrypt, Argon2id or SHA-256 password hashes. Verify a password against an existing hash. Adjustable cost factor.
- Free, no sign-up
- No data stored
- Reviewed 2026-01-15
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About the Bcrypt Hash Generator
Generate a password hash using bcrypt (default), Argon2id or SHA-256 crypt. Adjust the cost/rounds parameter to balance security and speed. A verify mode lets you check whether a plaintext password matches an existing hash.
How to use the Bcrypt Hash Generator
- Enter a password to hash.
- Select the algorithm.
- Adjust cost/rounds if needed.
- Optionally paste a hash to verify against.
- View or copy the generated hash.
Frequently asked questions
What cost factor should I use for bcrypt?
Cost 10–12 is standard for web applications (100–400ms per hash). Increase if your server is powerful; never go below 10.
Is Argon2 better than bcrypt?
Argon2id is the current recommendation (winner of the Password Hashing Competition). It resists both GPU and memory-tradeoff attacks. Bcrypt remains secure but is being superseded.
Can I reverse a hash to get the password?
No. Cryptographic hashing is one-way. You can only verify a guess against the hash, not extract the original input.