UUID Generator

Create RFC 4122 compliant UUIDs in your browser — no server, no tracking.

Version

Count

Wrap char

Uppercase

No hyphens

Wrap in chars

Output

af3eba06-00cd-60c-63-88a4a68362e0

Frequently asked questions+

What is UUID v4?

UUID v4 is a 128-bit identifier where 122 bits are randomly generated. It provides a collision probability so low that you can safely generate billions of them per second for centuries before expecting a collision.

v4 vs v7 — which should I use?

Use v4 for security-sensitive IDs where unpredictability matters (tokens, session IDs). Use v7 for database primary keys when you want time-ordered IDs that sort correctly without a separate timestamp column.

Is this tool safe?

Yes. All UUIDs are generated entirely in your browser using the Web Crypto API. No data is sent to any server. Refresh the page to clear everything.