Category: Developer tools
UUID Generator
Generate random v4 UUIDs in bulk, locally
Generate up to 100 random version 4 UUIDs at once, with or without hyphens, in upper or lower case. Created locally with the Web Crypto API.
0 UUID v4
The result will appear here.
Everything on this page is processed in your browser. Nothing is uploaded.
What this tool does
A version 4 UUID is a 128-bit identifier built from random data, which makes collisions effectively impossible in practice. These are produced by your browser's cryptographic random number generator, so they are never transmitted and never reused by anyone else.
How to use it
- Set how many identifiers you need, from 1 to 100.
- Choose whether to keep hyphens and whether to use uppercase.
- Press Generate and copy the list.
Privacy
This tool runs entirely in your browser. Your input is never uploaded, stored or shared — closing the tab removes it.
Frequently asked questions
- Are these UUIDs unique?
- They come from 122 bits of randomness, so the chance of a repeat is negligible even across billions of identifiers.
- Can I use them in a database?
- Yes. Version 4 UUIDs are a common primary key format and are safe to use as public identifiers because they reveal no data.