UUID/GUID Generator
Generate UUIDs
Click "Generate" to create UUIDs...
Validate UUID
Enter a UUID and click "Validate"...
What is a UUID?
A UUID (Universally Unique Identifier), also known as a GUID (Globally Unique Identifier), is a 128-bit identifier that is practically unique across space and time. This tool generates cryptographically random UUID v4 values using your browser's built-in random number generator. No data leaves your device.
Common Use Cases
- Database Primary Keys — Use UUIDs as primary keys in distributed databases where auto-increment IDs would cause conflicts. UUIDs can be generated independently on any node without coordination.
- API Request Tracking — Assign a unique UUID to each API request for end-to-end tracing across microservices. Correlate logs, errors, and metrics using the request ID throughout your system.
- Session and Token Identifiers — Generate unique session IDs, correlation tokens, or temporary file names. UUIDs are ideal whenever you need a unique identifier that won't collide with existing values.