UUID Generator
Generate random version-4 UUIDs, one or many at a time.
About this tool
A UUID (Universally Unique Identifier) is a 128-bit value written as 36 characters, used as an identifier that's practically guaranteed to be unique without a central authority. They're handy for database keys, file names, request IDs and anywhere you need an id that won't collide.
This tool creates version-4 (random) UUIDs. Generate one or a whole batch, then copy them. Values are generated in your browser and are never sent anywhere.
Frequently asked questions
- What is a version-4 UUID?
- A UUID whose bits are almost entirely random. The odds of two version-4 UUIDs colliding are vanishingly small, which is why they're widely used as ids.
- Are these UUIDs safe to use as identifiers?
- Yes, for uniqueness. They're generated with a cryptographically strong random source in the browser. They are not secret, though — treat them as ids, not passwords.
- How many can I generate at once?
- Up to 100 at a time. Enter the number you want and generate the whole batch in one go.