# UUID Generator

> Generate RFC 4122 version 4 UUIDs in bulk and copy them with one click, entirely in your browser.

Canonical: https://host-tools.com/tools/uuid-generator/

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## What is a UUID v4?

A Universally Unique Identifier (UUID) is a 128-bit number written as 32 hexadecimal digits in the
form `xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx`. Version 4 UUIDs are generated from random data, so
each one is effectively unique — perfect for database primary keys and API identifiers.

UUIDs are generated locally in your browser using the Web Crypto API, so nothing is sent to any
server.