UUID Generator
Generate a random version 4 UUID instantly in your browser.
Quick answer: enter your details below and click Generate UUID — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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How to use
- Click Generate UUID.
- Copy the UUID shown.
- Paste it wherever you need a unique identifier.
About this tool
A UUID (universally unique identifier) is a 128-bit label written as 32 hexadecimal characters in five groups. This tool creates a version 4 UUID, where most bits are random, so each result is practically unique. It uses the browser's built-in random UUID function when available and falls back to a Math.random-based generator otherwise, and nothing is sent anywhere.
Frequently asked questions
Is a version 4 UUID guaranteed to be unique?
No generator can promise absolute uniqueness, but with 122 random bits a collision is so unlikely that version 4 UUIDs are used as unique IDs in practice.
Does this tool send anything to a server?
No. The UUID is generated locally in your browser and is never uploaded or stored.