UUID for Developers: What Is It and Why Do You Need It? - Blog - Adawa.at

Complete guide to understanding and using UUID in your applications

UUID is a universally unique identifier used in databases and distributed applications.

What is UUID?
- Universally Unique Identifier
- 128-bit identifier
- Guaranteed uniqueness (99.99%)
- No central server coordination needed

UUID Types:
- UUID v1: based on time & MAC address
- UUID v4: completely random (most common)
- UUID v5: based on hash

When to Use UUID?
- Record identifiers in databases
- Unique file names
- Session tokens
- Request identifiers in APIs
- Distributed systems

UUID Advantages:
- No need for auto-increment
- Safe for public use
- Works in distributed systems
- Collision-free

Use UUID generator to create unique identifiers!