UUID / GUID Generator
Generate cryptographically secure v4 UUIDs instantly online. Free bulk UUID generator.
Generated UUIDs:
What is a UUID?
UUID stands for Universally Unique Identifier (also known as GUID). It is a 128-bit label used for information in computer systems. Standard UUIDs (like Version 4 generated here) are randomly generated and have virtually zero chance of collision.
Secure Generation
This tool uses the browser's native `crypto.randomUUID()` method, which relies on a cryptographically secure pseudorandom number generator (CSPRNG). It conforms to RFC 4122.
Example
Clicking generate produces a UUID like 3fa85f64-5717-4562-b3fc-2c963f66afa6.
Common Use Cases
- Generating unique primary keys for database records.
- Creating unique identifiers for API requests, sessions, or tracing.
FAQs
Can two generated UUIDs ever collide?
The probability is astronomically small — with 122 random bits, collisions are considered practically impossible even across billions of UUIDs.