UUID Generator

Create random version-4 UUIDs using your browser's secure random source. Generate one for a quick ID or a batch for seeding a database.

How many

Uppercase Wrap in braces

UUIDs

Your data is processed locally in your browser and is never uploaded to our server.

How to use uuid generator

Choose a quantity
Enter how many UUIDs you need (up to 1000 at once).
Pick formatting
Optionally switch to uppercase or wrap each value in braces.
Generate and copy
Click Generate, then copy the list or download it as a text file.

Secure randomness

Uses crypto.getRandomValues so IDs are unpredictable, not just Math.random.

Bulk output

Produce a single ID or thousands for tests and migrations.

Flexible format

Uppercase and brace-wrapped options match common language and DB conventions.

Which UUID version is this?

Version 4 — random. Roughly 122 bits of randomness make collisions effectively impossible in practice.

Are the UUIDs really unique?

They're generated from a cryptographic random source, so the chance of a repeat is astronomically small.

Can I get them without dashes?

This tool keeps the standard dashed format; you can remove dashes afterwards if a system needs the compact form.