UUID Generator
Runs in your browser — your data never leaves your device.
Generate random UUID v4 identifiers, one or in bulk.
0 UUIDs
What is UUID Generator?
A UUID is a 128-bit identifier written as 36 characters, like 3f2b8c1e-9d4a-4f6b-8e2a-1c5d7e9f0a3b. Version 4 UUIDs are random, so they can be created anywhere without coordination and are practically never repeated.
Useful for
- Creating primary keys for database records.
- Generating test data and fixtures.
- Making unique identifiers for files, events or requests.
How to use
- Choose how many UUIDs you need.
- Pick lowercase or uppercase and whether to keep the hyphens.
- Copy one UUID or the whole list.
Examples
One UUID v4
Quantity: 13f2b8c1e-9d4a-4f6b-8e2a-1c5d7e9f0a3bFrequently asked questions
Can two UUID v4 values be equal?
In theory yes, but with 122 random bits the chance is so small that it is ignored in practice.
Are the generated UUIDs secure?
They are created with crypto.randomUUID, the cryptographically secure generator built into your browser.
Are the UUIDs sent to or stored on a server?
No. They are generated in your browser and exist only on this page until you copy them. Reloading or clicking Generate again creates a new batch.