UUID Generator

Generate version 4 UUIDs (Universally Unique Identifiers) for your applications. Perfect for database keys, session IDs, and unique identifiers.

Click "Generate UUIDs" to create unique identifiers

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. Version 4 UUIDs are randomly generated and are extremely unlikely to collide.

UUID Format

UUIDs are typically displayed in this format:

xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx

Where x is any hexadecimal digit (0-9, a-f) and y is one of 8, 9, a, or b.

Common Use Cases

  • Database primary keys and unique identifiers
  • Session IDs and authentication tokens
  • File names for uploaded files
  • Tracking IDs for analytics and logging
  • Distributed system object identification

Why Use UUIDs?

  • No central authority needed to generate unique IDs
  • Can be generated offline without coordination
  • Extremely low probability of collision
  • Safe to use across distributed systems