UUID / GUID Generator
Generate random Version 4 UUIDs (GUIDs) instantly, in bulk.
About This Tool
A UUID (Universally Unique Identifier), also called a GUID, is a 128-bit identifier used across software systems to uniquely identify records, sessions, or objects without a central coordinating authority. This tool generates standards-compliant Version 4 (random) UUIDs using your browser's cryptographically secure random number generator.
How to Use UUID / GUID Generator
- Choose how many UUIDs you want to generate.
- Click "Generate".
- Copy a single UUID or all of them at once.
Frequently Asked Questions
How unique are these UUIDs really?
Version 4 UUIDs have 122 random bits, making accidental collisions astronomically unlikely — trillions of UUIDs would need to be generated before a collision becomes statistically probable.
Are these cryptographically secure?
Yes, generation uses the Web Crypto API's secure random number generator, not a predictable pseudo-random function.