UUID generator
Random v4 or time-ordered v7 UUIDs.
Output
Output appears here as you type.
What this does
Version 4 uses `crypto.randomUUID()`, which draws from the platform CSPRNG. Version 7 (RFC 9562) puts the current time in milliseconds first and fills the rest from the same CSPRNG, so ids made later sort later: the recommended choice for database keys. Both are suitable for real identifiers, not just placeholders.
Limits
- Version 7 ids reveal roughly when they were made. Use version 4 where that matters.
Is this private?
Yes, and you can check rather than take our word for it. Open your browser's network tab and run the tool: your file never appears in it, because there is no server to send it to. The whole site is static files.
