UUID Generator

Version 4 (random) UUIDs, via the browser's built-in crypto.randomUUID(). Runs entirely in your browser — nothing is sent anywhere.

What makes a UUID "version 4"

A UUID is a 128-bit identifier, conventionally written as 32 hex digits in five groups (8-4-4-4-12). Version 4 means the bits are generated randomly (aside from a few fixed bits that mark the version and variant) rather than derived from a timestamp or hardware address the way earlier UUID versions were — random generation is the version most applications reach for today because it needs no coordination between generators to avoid collisions. This tool uses crypto.randomUUID(), the browser's own cryptographically secure random UUID generator, not a hand-rolled random-number implementation.