UUID v4 Generator
Generate universally unique identifiers (UUID v4) for databases, software mapping, and local development.
How to generate a UUID v4
Click "Generate New UUID" to instantly produce a universally unique identifier. The UUID is cryptographically random (v4). You can safely use this identifier as a primary key in your database or distributed system.
What is a UUID?
A Universally Unique Identifier (UUID) is a 128-bit label used for information in computer systems. A UUID v4 is generated purely using random numbers, making the probability of a collision (generating the same ID twice) astronomically low.
Why Developers use UUIDs
UUIDs are incredibly useful in modern distributed systems, microservices, and databases. Unlike auto-incrementing integers, UUIDs can be generated independently across multiple servers without risking duplicates. They also prevent malicious users from guessing the number of records in your database or enumerating sequential IDs.