UUID generator
Create unique identifiers for databases, APIs, files or tests.
Everything runs in your browser. Nothing you type or paste is sent to a server.
How to use the UUID generator
- 1
Choose the version: random v4 or time-ordered v7.
- 2
Set how many you need and the format.
- 3
Copy one, copy them all or download them as a file.
About this tool
A UUID (GUID in the Microsoft world) is a 128-bit identifier that is practically impossible to repeat. They're generated with your browser's cryptographic random generator.
UUID v7 starts with the creation time, so values sort on their own and work better as database primary keys.
Frequently asked questions
Can they repeat?
In practice, no: the chance of a v4 collision is negligible even across billions of IDs.
Are UUID and GUID the same?
Yes, GUID is Microsoft's name for the same standard.
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