UUID Generator

Generate RFC 4122 compliant UUID v4 identifiers

Quantity

Format

Version4 (Random)

Entropy122 bits

Format8-4-4-4-12

Result

UUID v4: Universally Unique Identifier generated using cryptographically secure random numbers. Version 4 UUIDs have 122 random bits, making collisions virtually impossible.

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across space and time. UUID v4 uses random numbers and is the most commonly used version.

UUID v4 Structure

xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx

Where 4 indicates version 4, and y is one of 8, 9, A, or B.

Common Use Cases

Database primary keys
Session identifiers
Distributed system object IDs
File naming in storage systems
Correlation IDs for logging