UUID Generator
Generate random version 4 UUIDs, one or thousands at a time.
Runs in your browser using crypto.randomUUID — nothing is uploaded
How to use it
- Choose how many to generate and the formatting.
- Press Generate, then copy or download the list.
Questions
Can two generated UUIDs collide?
A version 4 UUID has 122 random bits. You would need to generate about a billion per second for 85 years to reach a one-in-a-billion chance of a single collision. In practice, no.
What is the difference between UUID and GUID?
None technically — GUID is Microsoft’s name for the same 128-bit identifier. GUIDs are conventionally written in braces, which this tool can add.