UUID Generator
Generate cryptographically random v4 UUIDs in bulk, with copy and formatting options.
About UUID Generator
Generate random version-4 UUIDs (GUIDs) using your browser's cryptographically secure random source. Create up to 1000 at once, toggle uppercase or hyphen-free formats, and copy individually or all together.
How to use UUID Generator
- 1
Set how many UUIDs you need.
- 2
Optionally switch on uppercase or turn off hyphens.
- 3
Click Generate.
- 4
Copy a single UUID or all of them at once.
Frequently Asked Questions
Are these UUIDs secure / random?
Yes. They use crypto.randomUUID (or the Web Crypto random source), which is cryptographically strong — not Math.random.
What version are they?
Version 4 (random). The version and variant bits are set per the UUID specification.