UUID Generator
Generate UUID v4 or sortable UUID v7 identifiers in bulk.
Inspect a UUID
Runs 100% in your browser. Your files are not uploaded to any server.
How to use UUID Generator
- Choose v4 (random) or v7 (time-ordered).
- Pick how many you need and the format.
- Click “Generate”, then copy them all at once.
- Paste a UUID into the inspector to see its version and, for v7, when it was created.
Frequently asked questions
Should I use v4 or v7?
v7 starts with a timestamp, so new IDs sort in creation order — great for database primary keys and indexes. v4 is fully random and reveals nothing about when it was made.
Can two UUIDs ever be the same?
In practice, no. A v4 UUID has 122 random bits; you would need to generate billions per second for many years to have a realistic chance of a duplicate.
Is UUID Generator free?
Yes. UUID Generator is free to use with no sign-up and no watermark.
Are my files uploaded to your server?
No. All processing happens locally in your browser using JavaScript and WebAssembly. Your files never leave your device, which also makes it fast and private.
Does it work on my phone?
Yes. It works in any modern browser on Windows, Mac, Linux, Android and iPhone. Very large files may be slow on older phones.