UUIDs
Generate up to 100 version-4 UUIDs at once using your browser's secure random generator.
Hashes
Type text to see its SHA-1, SHA-256, SHA-384 and SHA-512 digests, calculated locally with the Web Crypto API.
Frequently asked questions
Can two UUIDs collide?
The chance is astronomically small — you'd need to generate billions per second for decades to expect one.
Can I hash passwords with this?
Don't store passwords with a plain hash. Use a slow password hashing function such as bcrypt, scrypt or Argon2.
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