UUID Generator
Instantly generate one or many random UUID v4 values
Generate as many collision-free unique identifiers (UUID v4) as you need. Use them for database keys, file names, session IDs, and more.
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🔒 Everything runs 100% in your browser. Your files and input are never uploaded to any server.
How to use
- Set how many UUIDs to generate.
- Click 'Generate' to produce the list of UUIDs.
- Toggle options like removing hyphens or uppercase, then copy.
FAQ
- How unique is a UUID v4, really?
- With 122 bits of randomness, it's unique enough that collisions are effectively impossible — even generating billions of them, the chance of a duplicate is negligible.
- Aren't browser-generated UUIDs predictable?
- No. They use the browser's cryptographic random source (crypto.getRandomValues), which makes them very hard to predict.
- Are they logged on a server?
- No. They're all generated in your browser and stored nowhere.