UUID Generator
Generate random UUIDs (Universally Unique Identifiers) version 4 instantly.
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across space and time. UUIDs are used to identify information in computer systems without requiring central coordination.
Version 4 UUIDs are randomly generated. The probability of generating duplicate UUIDs is so low that it's considered practically impossible — you'd need to generate 1 billion UUIDs per second for about 85 years to have a 50% chance of a collision.
UUID Format
A standard UUID looks like: 550e8400-e29b-41d4-a716-446655440000
It consists of 32 hexadecimal digits displayed in 5 groups separated by hyphens, in the form 8-4-4-4-12.
Common Use Cases
- Database primary keys
- Session identifiers
- Transaction IDs
- File names to prevent collisions
- Distributed system identifiers