UUID Generator - Free Online UUID/GUID Generator

What is UUID?

UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across both space and time. UUIDs are used in software development to identify information without requiring a central coordinating authority.

UUID v4 (Random)

Generated using random or pseudo-random numbers. Most commonly used for general purposes.

Example: 550e8400-e29b-41d4-a716-446655440000

UUID v1 (Timestamp)

Based on timestamp and MAC address. Useful when time-ordered IDs are needed.

Example: 6ba7b810-9dad-11d1-80b4-00c04fd430c8

Common Use Cases

• Database primary keys

• Session identifiers

• API request tracking

• File naming

• Distributed systems