Generate single or multiple random UUID v4 identifiers instantly. A developer utility operating client-side in your browser.
How to use it
- Choose how many identifiers you need.
- Generate the list.
- Copy a single UUID, or all of them at once.
Frequently asked questions
What is a UUID v4?
A 128-bit identifier built from random values. It can be created anywhere without coordinating with a server and still be effectively unique.
Could two UUIDs collide?
In theory yes, in practice no. You would need to generate billions per second for decades before a collision became likely.
Should I use a UUID as a database primary key?
It removes any need for a central sequence, but random keys fragment B-tree indexes. On large tables consider a sortable variant such as UUID v7 instead.