About the UUID Generator
Generate cryptographically random version-4 UUIDs in bulk. Choose how many you need, then optionally format them in uppercase or without hyphens, and copy them all with one click. UUIDs are created with your browser's secure random generator.
UUIDs are ideal as unique identifiers for database rows, API keys, file names and distributed systems where you can't rely on a central counter. Because they're generated locally, no values are ever sent to or logged by a server.
Features
- Cryptographically random version-4 UUIDs
- Generate up to 100 at once
- Optional uppercase formatting
- Optional hyphen-free (32-character) format
- Copy all generated UUIDs in one click
- Generated securely in your browser
How to use the UUID generator
- Enter how many UUIDs you need.
- Toggle uppercase or hyphens if you want a different format.
- Click Generate to create a fresh batch.
- Click Copy all to copy them to your clipboard.
Frequently asked questions
What is a version-4 UUID?
A version-4 UUID is a 128-bit identifier whose bits are almost entirely random, making accidental collisions astronomically unlikely.
Are these UUIDs unique?
In practice, yes. Version-4 UUIDs are random enough that you can treat each one as globally unique for virtually any application.
Are they generated securely?
Yes. They use your browser's cryptographically secure random number generator and are created entirely on your device.
Can I generate many at once?
Yes — you can generate up to 100 UUIDs in a single batch and copy them all together.