UUID Generator
Generate random UUID v4 identifiers online
About UUID Generator
Generate random UUIDs (Universally Unique Identifiers) version 4 instantly. UUIDs are used as unique identifiers in databases, distributed systems, API resources, and session tokens. Generate single or bulk UUIDs with options for uppercase, lowercase, and with or without hyphens.
Use Cases
- Generating primary keys for database records
- Creating unique session identifiers
- Assigning resource IDs in RESTful APIs
- Generating correlation IDs for distributed tracing
Frequently Asked Questions
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information. Version 4 UUIDs are randomly generated and have an extremely low probability of collision.
Are these UUIDs truly random?
Yes. This tool uses the browser's crypto.randomUUID() API which provides cryptographically strong random values.
What's the difference between UUID and GUID?
They're the same thing. UUID is the standard term, while GUID (Globally Unique Identifier) is Microsoft's name for the same concept.