About UUIDs
A UUID (or GUID) is a 128-bit identifier that is unique for all practical purposes, so you can create IDs without asking a central database. Version 4 is made entirely of random bits. Version 7 starts with a millisecond timestamp, so UUIDs created later sort after earlier ones, which makes them friendlier to database indexes.
Everything is generated in your browser with crypto.getRandomValues. Nothing is sent to a server.
- 1 Choose version 4 or 7 and how many UUIDs you need.
- 2 Pick the format: uppercase, hyphens and braces.
- 3 Copy the list or download it as a text file.