UUID Generator
Generate random version 4 UUIDs or time-ordered version 7 UUIDs, one or up to 1,000 at a time, with or without hyphens.
Free · No upload · 100% on your device
How to use UUID Generator
- Choose the settings in the side panel.
- The result updates instantly. Select “Generate again” for a fresh one.
- Copy the result or download it.
Private by design. Everything you type, open or record is processed in this browser tab and is never uploaded to KittySuite.
About UUID Generator
Version 4 UUIDs are 122 random bits, so collisions are practically impossible. Version 7 starts with the current time in milliseconds, so IDs created later sort later, which keeps database indexes efficient.
Values come from the browser’s cryptographic random generator (crypto.getRandomValues) on this device. Nothing is sent or stored, so no one else ever sees them.
UUID Generator: frequently asked questions
How do I generate a UUID?
Choose version 4 or 7 and how many you need, from 1 to 1,000, then copy them.
What is the difference between v4 and v7?
v4 is 122 random bits. v7 starts with the current time in milliseconds, so IDs created later sort later, which keeps database indexes efficient.
Can two UUIDs ever be the same?
In practice no; with 122 random bits a collision is vanishingly unlikely.
Can I remove the hyphens or use braces?
Yes. Turn hyphens off, switch to uppercase or wrap each UUID in braces.