UUID Generator
Generate random UUIDs (v4) for your applications and databases.
Generated UUID
Bulk UUIDs
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About UUIDs
A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across space and time. Also known as GUID (Globally Unique Identifier) in Microsoft systems.
UUID Format
A UUID is displayed as 32 hexadecimal digits in 5 groups separated by hyphens:
xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx
The "4" indicates version 4 (random), and "y" is one of 8, 9, A, or B.
Common Uses
- Database primary keys
- Session identifiers
- Distributed systems identification
- File naming
- Transaction IDs