UUID v4 Generator
Generate random version-4 UUIDs using your browser's cryptographically secure crypto.randomUUID(). Generate one at a time or in batches — nothing is sent to any server.
About UUID v4
A version-4 UUID is a 128-bit identifier with 122 random bits, giving a collision probability so low it is safe to generate IDs independently across machines without coordination. This tool uses the browser's native crypto.randomUUID() API, which draws from a cryptographically secure random source — unlike Math.random()-based generators.