UUID Generator 2026 Generate Unique IDs Online Free | v1, v4, v7

UUID Generator Create Unique Identifiers Instantly

UUID (Universally Unique Identifier) is essential for modern application development. Our free UUID generator creates unique identifiers for database primary keys, API endpoints, session tokens, and more. Generate single or bulk UUIDs in various versions.

What is a UUID?

A UUID is a 128-bit number represented as 32 hexadecimal digits in the format: 8-4-4-4-12. The uniqueness comes from the massive number space (2^128 possibilities), making collisions practically impossible even with billions of generations.

UUID Versions Explained

• UUID v1: Based on timestamp and MAC address (time based)
• UUID v4: Completely random (most commonly used)
• UUID v7: Time-ordered, perfect for database indexing

Why Use UUIDs?

1. Global Uniqueness: No central coordination needed
2. Distributed Systems: Generate IDs across multiple servers
3. Security: Harder to guess than sequential IDs
4. Database Merging: No ID conflicts when merging data
5. API Design: Clean, standardized resource identifiers

Common Use Cases

Database Primary Keys: Avoid auto-increment issues
API Resources: RESTful API endpoint identifiers
Session Tokens: Secure session management
File Names: Prevent filename collisions
Transaction IDs: Track financial transaction