GUID / UUID Generator — standard unique identifiers, generated in bulk right in your browser
Whenever you need collision-free identifiers for database primary keys, API keys, or session IDs, this tool creates RFC 9562-compliant UUIDs instantly in the browser. It is handy for developers, testers, and anyone building sample data who needs values fast.
How to use
- Pick v4 (fully random) or v7 (time-ordered) from the tabs at the top.
- Drag the slider to choose how many to make, from 1 up to 50.
- Toggle the uppercase, remove-hyphens, or wrap-in-braces options as needed.
- Hit Copy to grab one or all values, and Regenerate to draw fresh ones.
Features & tips
- Values are produced with the crypto secure random source and never leave your device.
- v7 embeds a timestamp at the front, so sorted lists keep their creation order.
- When you generate several, the Copy button grabs them all as newline-separated text.
- The remove-hyphens option gives you the 32-character form some systems expect.
FAQ
Q. Should I use v4 or v7? A. Use v4 when order does not matter; choose v7 when sort order counts, such as database indexes.
Q. Could the same value appear twice? A. With 122 bits of randomness, the chance of a collision is negligible in practice.
Q. Are the generated values stored anywhere? A. No. Everything is computed in your browser and nothing is saved or transmitted.
