How to Use UUID Generator
Bulk-generate random UUID v4 identifiers using the browser's cryptographically secure random source. Toggle uppercase output and hyphens, and copy the whole batch at once.
Open the UUID Generator tool →What is UUID Generator?
Generate one or thousands of RFC 4122 version-4 UUIDs, with optional uppercase and hyphen control. It's completely free, needs no sign-up, and runs entirely in your browser — so it's fast and private.
How to use UUID Generator
- Open the UUID Generator tool.
- Paste or type your input.
- Set any options provided.
- Copy the result. Everything runs in your browser — nothing is uploaded.
Frequently asked questions
What kind of UUIDs does this generate?
RFC 4122 version-4 UUIDs, which are random. Each carries 122 random bits, so collisions are astronomically unlikely.
Are the UUIDs cryptographically random?
They use the browser's secure random source, so they're unguessable identifiers. A UUID on its own still shouldn't be used as a password or auth token.
Can I generate many at once?
Yes — create thousands in one go, and toggle uppercase or strip hyphens to match your system's expected format.
Ready to try it?
Open UUID Generator →