UUID Generator
Generate random v4 UUIDs, one or in bulk.
Your UUIDs appear here
Choose how many you need, then click Regenerate. Each version 4 UUID is built from your browser's secure random generator — copy one or copy them all.
Runs entirely in your browserGenerate random v4 UUIDs, locally
A UUID (universally unique identifier) is a 128-bit value written as 36 characters, used to label records, sessions, files, and messages without a central authority. This tool creates version 4 UUIDs — the random kind — using your browser's cryptographic random number generator, so they are suitable as unique keys. Generate one or up to a hundred at once, copy any single value or the whole list, and regenerate whenever you like. Everything runs in your browser, so nothing is uploaded.
Common questions
What kind of UUIDs does this generate?
Version 4 (random) UUIDs. Each is produced from cryptographically secure random bytes, with the version and variant bits set per the UUID spec.
How do I generate more than one?
Set the count to any number from 1 to 100 and click Regenerate. The tool creates that many fresh UUIDs and lists them, each with its own copy button.
Are these UUIDs random and secure?
Yes. They use crypto.randomUUID where available, and otherwise crypto.getRandomValues — both are the browser's cryptographically secure random source, not Math.random.
Can I copy all of them at once?
Yes. Use Copy all to put every generated UUID on the clipboard, one per line, or use the copy button on any individual UUID.
Are the UUIDs sent anywhere?
No. They are generated entirely in your browser tab and never leave your device.