UUID Generator

How to use

Adjust the count slider and choose a format (hyphenated, compact, braces, URN) and case. UUIDs generate instantly. Click Regenerate All for a fresh batch, or copy individual UUIDs with the Copy button.

Why use this tool

Generate cryptographically random RFC 4122 v4 UUIDs in bulk without any server round-trip. Useful for database IDs, test data, and API keys.

FAQ

Are generated UUIDs truly random?

Yes. The tool uses crypto.randomUUID() — a cryptographically secure PRNG built into modern browsers.

What is the difference between UUID formats?

Hyphenated (8-4-4-4-12) is the standard. Compact removes dashes. Braces add {} around it. URN prefixes with 'urn:uuid:'.

Are UUIDs sent to your servers?

No. All generation happens in your browser. Nothing is ever transmitted.