UUID Generator
Bulk-generate random RFC 4122 version 4 UUIDs.
UUIDs (universally unique identifiers) are used throughout software to label database rows, sessions, and objects with an identifier that's extremely unlikely to collide with any other. This tool generates one or many version-4 (random) UUIDs at once using the browser's native crypto.randomUUID function, then lets you copy them all in one go.
How to use it
- Set how many UUIDs you want to generate.
- Click Generate.
- Review the list of UUIDs.
- Click Copy All to copy every UUID, one per line.
Frequently asked questions
What does 'version 4' mean?
Version 4 UUIDs are generated from random or pseudo-random numbers, as opposed to versions based on timestamps or hardware identifiers — they're the most common type for general-purpose unique IDs.
How unlikely is a UUID collision?
With 122 random bits, the probability of two version-4 UUIDs colliding is astronomically small — practically negligible for real-world use.
Can I generate thousands at once?
Yes, though generating very large batches (tens of thousands) may take a moment since each one uses the browser's secure random number generator.