UUID Generator

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

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

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.

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