UUID Generator

Generate random UUIDs (v4). Choose how many, then copy.

Number of UUIDs

Click "Generate" to create UUIDs.

About UUIDs

UUIDs are widely used in software for unique identifiers: database keys, API tokens, session IDs, and file names. This tool generates UUID version 4 (random) values that are suitable for most applications.

Frequently Asked Questions

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit value often displayed as 36 characters (8-4-4-4-12 hex with hyphens). UUID v4 is random and suitable for unique IDs.

Are these cryptographically random?

Yes. The tool uses the Web Crypto API (crypto.randomUUID or crypto.getRandomValues) to generate random bytes, so the UUIDs are suitable for security-sensitive use.

Is my data sent to a server?

No. UUIDs are generated entirely in your browser. Nothing is uploaded.