UUID Generator
Spin up one random version 4 UUID or a whole list of them, ready to copy into a database, a config file, or a test.
How it works
A UUID is a 128-bit identifier written as 32 hex digits in a 8-4-4-4-12 pattern. Version 4 UUIDs are almost entirely random, which is why they're the go-to for generating IDs without a central authority handing them out.
This generator uses your browser's secure randomness to build each one, so the odds of ever producing the same UUID twice are astronomically small — small enough that databases treat them as effectively unique without checking.
Ask for as many as you need and copy the whole list at once. They're generated locally, so nothing is logged or sent anywhere.
Frequently asked questions
What is a version 4 UUID?
It's a universally unique identifier where almost all the bits are random, apart from a few reserved to mark the version and variant. It's the most common UUID type for generating IDs on the fly.
Are these UUIDs really unique?
Effectively, yes. There are so many possible version 4 UUIDs that the chance of a collision is negligible, which is why systems rely on them for primary keys and identifiers without coordinating.
Can I generate several at once?
Yes. Set how many you want and the tool produces the whole batch, ready to copy as a list — handy for seeding a database or writing tests.