UUID Generator
Generate one or many cryptographically random UUID v4 values.
The UUID Generator creates random UUID v4 identifiers — one to a hundred at a time — using the browser's own cryptographic random number function.
Your files are processed locally in your browser and are not uploaded.
How to use UUID Generator
- 1
Choose how many to generate
From 1 up to 100.
- 2
Click generate
- 3
Copy the result(s)
What makes a UUID v4 reliable
A UUID v4 is generated almost entirely from random bits. Using a cryptographic source of randomness — the same kind used to generate secure keys and tokens — the odds of two UUID v4s colliding are low enough to be treated as effectively impossible in practice.
When should you use this tool?
Developers
Generate a unique identifier for a record, session or resource.
Testing
Create several test IDs at once, with no repeats.
Databases
Fill in a primary key or unique identifier field.
Frequently asked questions
- Are these UUIDs cryptographically random?
- Yes. They're generated with crypto.randomUUID, the browser's native cryptographically secure random UUID v4 generator.