UUID Generator
Generate cryptographically-random UUID v4 values, one or many at a time.
How to use the UUID Generator
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Set how many UUIDs you need.
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Toggle formatting options.
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Click Generate and copy the results.
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit value used as a practically collision-free ID for database rows, API resources, files and events. Version 4 UUIDs are random, generated here with the browser's cryptographic random source. Use them anywhere you need a unique identifier without coordinating with a central server.
Key features
- Cryptographically random UUID v4
- Generate up to 500 at once
- Uppercase, hyphen-free and braced variants
- Copy all with one click
Frequently asked questions
Are these UUIDs truly unique?
Version 4 UUIDs are random with 122 random bits, making collisions astronomically unlikely for practical use.
Are they random or sequential?
They're random (v4), generated with the browser's crypto API — not time-ordered.
Can I generate many at once?
Yes, up to 500 per batch, and you can copy them all together.