UUID Generator
Generate UUID v4 identifiers instantly and securely in your browser
7df3ea9c-7189-42d0-a1e3-29df9eeb9bd1 What Is A UUID?
A UUID (Universally Unique Identifier) is a 128-bit unique identifier commonly used in databases, APIs, distributed systems and application development.
Common Use Cases
- Database Primary Keys
- REST API Request IDs
- Session Identifiers
- Microservices Correlation IDs
- File Tracking Systems
Frequently Asked Questions
What is a UUID?
UUID stands for Universally Unique Identifier. It is a 128-bit label used for unique resources in software systems.
What version of UUID is generated here?
This tool generates version 4 UUIDs, which are constructed using completely random or pseudo-random values.
Are generated UUID v4 identifiers guaranteed to be unique?
While v4 is random, the collision probability is so low (one in trillions) that they are considered practically unique.
Can I generate multiple UUIDs at once?
Yes. You can select the number of UUIDs to generate and produce a batch of unique IDs instantly.
Does the generator use a cryptographically secure source?
Yes, it uses the browser's secure `crypto.getRandomValues()` API to ensure cryptographically secure randomness.
What is the difference between UUID and GUID?
GUID is Microsoft's implementation of the standard UUID specification. They are structurally identical.
How do I copy the generated UUID list?
Click the "Copy" button to save the entire generated list of identifiers to your system clipboard.
Is my generated UUID list stored on a server?
No. Generation is entirely local, and no generated values are logged or stored anywhere.