UUID Generator
Generate one or many version-4 UUIDs using your browser's cryptographic random source. Choose upper or lower case and copy the list.
- Runs entirely in your browser
- No sign-up, no watermark
- Free and unlimited
🔒 Your file stays on your device
How to use UUID Generator
- 1
Open UUID Generator and fill in the fields.
- 2
Pick any options that apply.
- 3
Read the result straight away — it recalculates as you type.
What you get
- Version 4 (random)
- Generate up to 100 at once
- Uses crypto.getRandomValues
What happens to your files
This tool runs entirely in your browser. The file you choose is read into memory, processed on your device, and offered back as a download. Nothing is uploaded and nothing is kept once you leave the page.
There is no account, no email, no watermark and no daily limit. Come back whenever you need it.
Frequently asked questions
- Are these safe to use as database keys?
- Yes. Version-4 UUIDs from a cryptographic RNG have a negligible collision probability and are widely used as identifiers.