UUID Generator
Generate cryptographically-random UUID v4 identifiers individually or in bulk, then copy them all with one click — perfect for seeding databases, test data and request IDs.
Runs entirely in your browser — nothing is uploaded.
About UUID Generator
Generate cryptographically-random UUID v4 identifiers individually or in bulk, then copy them all with one click — perfect for seeding databases, test data and request IDs.
- Uses the browser crypto API for genuinely random, RFC 4122 compliant UUID v4 values.
- Generate up to 1,000 at once and copy the whole list in a single click.
- Optional uppercase and no-dashes formatting for different systems.
UUID Generator is part of Upwwards Tools, a free collection of browser-based utilities built by the team at Upwwards. Like the rest of the suite, it's free, requires no sign-up, and keeps your data on your device.
Frequently asked questions
What is UUID Generator?
Generate cryptographically-random UUID v4 identifiers individually or in bulk, then copy them all with one click — perfect for seeding databases, test data and request IDs.
Is UUID Generator free to use?
Yes — UUID Generator is completely free with no sign-up, account or usage limits. It is part of the free Upwwards Tools collection built by Upwwards.
Is my data private when I use UUID Generator?
UUID Generator runs entirely in your browser. Everything you enter or upload is processed locally on your device and is never sent to a server, stored or logged.
Do I need to install anything to use UUID Generator?
No. UUID Generator works instantly in any modern web browser on desktop or mobile — there is nothing to download or install.