Generate cryptographically random version-4 UUIDs (also called GUIDs) individually or in bulk. A UUID is a 128-bit identifier that is practically guaranteed to be unique without any central coordinator, which makes it ideal for database primary keys, request IDs, file names and distributed systems where two machines must never collide. This generator uses the browser's built-in secure random source, so the values are suitable for real use, not just placeholders. Choose how many you need, click generate, and copy them all at once. Nothing is generated on a server. Every UUID is created locally in your browser.