Free Cryptographically Secure UUID Generator
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About This Tool
The Secure UUID Generator creates version 4 UUIDs using the browser's Web Crypto API — ensuring cryptographic randomness rather than weak pseudo-random generation. Use them as session tokens, database IDs, or API keys in testing environments. Free, no account, generated entirely in your browser.
How to Use
- 1
Set how many UUIDs to generate.
- 2
Click Generate — cryptographically random UUIDs appear in the output.
- 3
Copy individual UUIDs or the full list with one click.
Frequently Asked Questions
What makes a UUID "cryptographically secure"?
Cryptographic UUIDs use crypto.randomUUID() or crypto.getRandomValues() — making them statistically impossible to predict, unlike Math.random()-based UUIDs.
Can I use these UUIDs as session tokens?
For testing and prototyping, yes. For production session tokens, generate them server-side in a controlled, secure environment.
Is this secure UUID generator free?
Yes. Completely free with no account required.