UUID Generator
Generate random UUID v4 identifiers in bulk inside your browser.
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About this tool
UUID Generator — The UUID Generator creates random version 4 UUIDs (also called GUIDs) — 128-bit identifiers that are practically guaranteed to be unique without any central coordination. You can generate many at once and optionally output them in uppercase or without hyphens to match your system.
The randomness comes from your browser's cryptographic generator, and the identifiers never leave your device. UUID v4 is widely used for database keys, request IDs, file names, and distributed systems where collisions must be avoided.
How to use it
- Set how many UUIDs you want.
- Optionally enable uppercase or remove hyphens.
- Click Generate, then copy a single UUID or all of them.
Frequently Asked Questions
What is UUID version 4?+
Version 4 UUIDs are generated from random numbers. They carry a version marker and have about 122 random bits, making accidental collisions extremely unlikely.
Are these UUIDs truly random?+
They use the browser Web Crypto random generator, which is suitable for unique identifiers.
Is anything uploaded?+
No. Generation is entirely local.