UUID Generator
Generate random version 4 UUIDs. Nothing leaves your browser.
Frequently asked questions
Are these UUIDs guaranteed unique?
UUID v4 is generated from random bits with an astronomically low collision probability — safe for virtually all practical purposes, though not mathematically guaranteed in the absolute sense.
Can I use these as database primary keys?
Yes, that's a common use case — just be aware v4 UUIDs are random (not sequential), which can affect index performance on very large tables compared to sequential IDs.