UUID · Generator

How to generate UUIDs (free)

1. Choose how many UUIDs you need.
2. Optionally switch to uppercase, wrap in braces, or strip hyphens.
3. Click Generate, then Copy all. Nothing is uploaded.

What is a UUID?

A UUID (Universally Unique Identifier), also called a GUID, is a 128-bit value written as 32 hexadecimal digits in the form xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx. Because they can be generated independently without a central authority and practically never collide, UUIDs are ideal for database primary keys, distributed systems, file names and request IDs.

Version 4 UUIDs

This tool produces version 4 UUIDs, which are almost entirely random (122 random bits). The odds of ever generating the same v4 UUID twice are so small they can be ignored in practice. The randomness comes from your browser's cryptographically secure generator, not Math.random().

Formatting options

Some systems expect a specific style: SQL Server often uses uppercase with braces, while many APIs want lowercase with hyphens. Strip the hyphens for compact 32-character IDs. Mix and match to match your target format exactly.

Is this private?

Yes. Every UUID is generated inside your browser tab and is never transmitted, logged or stored. You can generate ten thousand at once fully offline once the page has loaded.