Developer Tool
GUID / UUID Generator
Generate universally unique identifiers (UUIDs/GUIDs) instantly. Supports UUID v1, v4, and multiple output formats.
Generated UUIDs (0)
What is a UUID?
A UUID (Universally Unique Identifier) or GUID (Globally Unique Identifier) is a 128-bit identifier that is unique across space and time. UUIDs are used in databases, distributed systems, and anywhere you need a unique identifier without central coordination.
UUID Versions
- v1: Time-based, includes timestamp and MAC address
- v4: Random, most commonly used
- Nil: All zeros, represents "no UUID"
- Max: All ones (f's), maximum value
UUID Format
UUIDs follow the format: xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx where M indicates the version and N indicates the variant.
Common Uses
- Database primary keys
- Session identifiers
- API request tracking
- Distributed system coordination
Need something simpler? Try our Random UUID Generator. Or decode tokens with our JWT Decoder.