UUID Generator

Generate random UUIDs (version 4). Copy to clipboard for use in databases, APIs, or any application that needs unique identifiers.

About this tool

A UUID (Universally Unique Identifier) is a 128-bit value usually shown as 36 characters with hyphens (e.g. 550e8400-e29b-41d4-a716-446655440000). Version 4 UUIDs are random and are used as unique IDs in databases, APIs, and distributed systems without central coordination.

How to use

Click Generate new UUID to create a random v4 UUID.
Click Copy to clipboard to paste it into your code or database.
Generate as many as you need; each is statistically unique.

UUID v426aded08-3e46-4ff5-89f3-30a91b49c47e

When to use this tool

Creating unique IDs for database records (users, orders, sessions).
Generating identifiers for API resources or distributed systems.
Replacing sequential IDs where you don't want guessable values.
Testing and demos: quick unique tokens or keys.

Tips

UUID v4 is random; no two runs should produce the same value in practice.
Store UUIDs as 36-character strings (with hyphens) or 32-character hex; many databases have a native UUID type.

FAQ

What is UUID v4?: A version 4 UUID is a 128-bit value generated from random (or pseudo-random) numbers. It's displayed as 8-4-4-4-12 hex digits with hyphens (e.g. 550e8400-e29b-41d4-a716-446655440000).
Can two UUIDs be the same?: Theoretically possible but astronomically unlikely. For practical purposes they are unique. Don't rely on uniqueness for security—use proper authentication and authorization.