UUID Generator.
Generate cryptographically random version-4 UUIDs. One at a time or in bulk.
Generated UUIDs
Generated locally — never sent anywhere
Local processing
Conversions happen in your browser. Nothing is uploaded.
Instant results
Native browser APIs mean no server queue, no waiting room.
No account needed
Open, drop, convert. No sign-up, no email, no friction.
Frequently asked questions
What's a v4 UUID?
A 128-bit identifier with 122 bits of randomness. Probability of collision is so low you can treat them as universally unique.
Is this cryptographically secure?
Yes. Uses window.crypto.getRandomValues — same source HTTPS uses.
Can I generate UUID v1, v5, v7?
Only v4 (random) for now.
Are my files really not uploaded?
Correct. Every conversion in this tool runs in your browser using JavaScript and the local file APIs. There is no server-side processing, no file upload, no temporary storage, and no log of what you converted. You can verify this by opening your browser's network tab while converting — the only traffic is loading the page itself.
Do I need an account or to install anything?
No. Open the page, drop your file, download the result. No signup, no email, no extension, no app.
Is there a file-size limit?
Not from us. The practical limit is your device's memory — browser tabs typically handle files in the hundreds of megabytes range without issues. Very large files may take longer to process on phones than on laptops.