UUID v4 Generator
Generate random UUIDs (v4) using your browser's cryptographic random number generator. Create one identifier or a batch of hundreds, uppercase or lowercase, with or without dashes.
🔒 100% private — files never leave your browser
How to use the UUID Generator
- 1 Choose how many UUIDs you need.
- 2 Toggle uppercase and dashes if you want a specific format.
- 3 Click "Generate" and copy the list.
Frequently asked questions
How unique are these UUIDs?
UUID v4 uses 122 random bits — the odds of a collision are so astronomically small (about 1 in 10^36 for a batch) that uniqueness is assumed everywhere.
Is the randomness cryptographically secure?
Yes. The tool uses the Web Crypto API, the browser's cryptographic random source.
Are UUIDs generated on a server?
No. They are generated entirely in your browser. Your files never leave your device — all processing happens locally in your browser.
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