UUID generator (v4 and v7)
UUID v4/v7 generator. Bulk mode for seed data.
About this tool
Generates random v4 UUIDs, or v7 UUIDs that are time-ordered, one at a time or in bulk. The browser's crypto supplies the randomness.
Good for
- Seed data and test fixtures
- Idempotency keys and request IDs when you're testing an API by hand
- Primary keys where v7's time ordering keeps your B-tree indexes happy
Not for
- Secrets: a UUID is an identifier, not a session token, API key, or password-reset token
- Anything where the creation time is sensitive, because a v7 UUID carries a millisecond timestamp anyone can read