Free UUID Generator Online (v4)
Generate secure random UUID v4 instantly. Supports bulk generation and one-click copy.
Generated UUIDs will appear here...
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. UUIDs are widely used in databases, distributed systems, APIs, authentication systems, and cloud infrastructure.
UUID v4 is the most commonly used version. It generates a random identifier using secure random numbers, making it extremely unlikely for two UUIDs to collide.
Why Use UUID v4?
UUID v4 is based entirely on randomness. Unlike incremental IDs, it does not expose predictable sequences. This makes it ideal for public APIs, authentication systems, and distributed applications where security and uniqueness are important.
Because UUIDs are globally unique, they eliminate the need for centralized ID generation in distributed systems.
Developer Use Cases
- Database primary keys
- Microservices correlation IDs
- API request tracking
- Session identifiers
- Testing and development
Bulk UUID Generation
Our UUID Generator allows bulk creation of multiple UUIDs at once. This is especially useful for developers who need large datasets for testing or seeding databases.
All UUID generation happens locally in your browser using the Web Crypto API. No data is sent to any server, ensuring security and privacy.
FAQ
Is UUID v4 secure?
Yes. UUID v4 uses cryptographically secure random values.
Can UUIDs collide?
The probability is extremely low. For practical purposes, collisions are negligible.
Is my data stored?
No. All generation happens in your browser.