UUID Generator
Generate UUIDs (v4 & v7)
About the UUID generator
Generate version 4 UUIDs (random 128-bit identifiers) with a single click. You can produce several at once and switch between upper and lower case. They are ideal for database keys, API request IDs, and unique file names.
Generation uses the browser's cryptographic randomness, yielding identifiers that practically never collide. Everything runs on your device and results are never sent anywhere.
Frequently asked questions
- Can UUID v4 values collide?
- With 122 bits of randomness, collisions are effectively impossible in real-world use, so they are safe as unique IDs.
- Can I generate several at once?
- Yes. Specify a count to output multiple UUIDs at once, which is handy for preparing test data.
- Are the generated UUIDs recorded?
- No. They are generated entirely in your browser and never sent to or stored on a server.