UUID Generator

A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across both space and time, with minimal coordination between systems generating IDs.

UUID Versions

Version 1 (Time-based)

UUID v1 is generated using the current timestamp and the MAC address of the computer. This ensures uniqueness across space and time but may expose information about when the ID was created and which computer created it.

Version 4 (Random)

UUID v4 is generated using random numbers. This is the most common version used today because it provides good uniqueness while revealing no identifying information.

Common Uses

• Database primary keys
• Session identifiers
• Transaction IDs
• Distributed systems where unique IDs are needed without coordination
• File names for uploaded content