UUID Generator
About UUIDs
A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. The probability of duplicate UUIDs is close enough to zero to be negligible.
UUID Format
UUIDs are represented as 32 hexadecimal digits, displayed in 5 groups separated by hyphens:
xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx- The digits are hexadecimal (0-9 and a-f)
- The fourth character of the third group is always `'4`'
- The first character of the fourth group is either 8, 9, a, or b
Common Use Cases
- Database primary keys
- Session IDs in web applications
- Unique file or resource identifiers
- Distributed systems where unique IDs are needed
- Transaction IDs in financial systems