UUID Generator

Generate one or many random UUID v4 identifiers instantly. Uses the browser's native cryptographic random source — no server round-trip required.

How to use this UUID generator

Choose how many UUIDs you need from the dropdown, then click Generate. Each one is printed on its own line in the output box. Click Copy All to copy the full list to your clipboard, ready to paste into code, a database seed script, or a spreadsheet.

What is a UUID v4?

A UUID (Universally Unique Identifier) is a 128-bit value formatted as 32 hexadecimal digits grouped into five sections, e.g. 3f2504e0-4f89-11d3-9a0c-0305e82c3301. Version 4 UUIDs are generated from random bits rather than timestamps or hardware addresses, making collisions astronomically unlikely without any central coordination. They're widely used as database primary keys, resource identifiers in distributed systems, and idempotency keys for API requests — anywhere you need a unique ID that multiple independent systems can generate safely at the same time.