Bcrypt / Argon2 Hash
Hash and verify passwords with bcrypt (cost 4–15) or Argon2id.
Runs on your machine. Nothing you paste is uploaded.
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What it does
Hash a password with bcrypt or Argon2id and check a password against an existing hash. Each result is broken down into its parts: algorithm version, cost or memory and iteration settings, salt and hash, so you can see exactly what a stored value contains.
Pick a bcrypt cost from 4 to 15 and see how long hashing took, or set Argon2id memory, iterations and parallelism, with the OWASP minimum as the default. You get a warning when a password passes bcrypt's 72-byte limit. Hashing runs locally in Rust, and passwords and hashes are never saved.
When you would reach for it
- Create a bcrypt hash to seed an admin user in a development database.
- Check whether a password matches a hash pulled from a user table while debugging a login.
- Measure how long different bcrypt cost values take before choosing one for production.
- Inspect an Argon2id PHC string to confirm the memory and iteration settings your app actually uses.
Also found by searching
- bcrypt
- argon2
- argon2id
- password
- hash
- verify
- salt
- cost
- kdf
- phc