What is a UUID/GUID?
A UUID (Universally Unique Identifier) or GUID (Globally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. The probability of duplicate UUIDs is so low that it's considered practically zero, making them perfect for distributed systems where unique identifiers are needed without central coordination.
Our UUID generator creates Version 4 UUIDs using cryptographically strong random numbers. Each UUID consists of 32 hexadecimal digits displayed in five groups separated by hyphens (8-4-4-4-12), for example: 550e8400-e29b-41d4-a716-446655440000.
UUID/GUID Generator
What is a UUID?
A Universally Unique Identifier (UUID) is a 128-bit number used to identify information in computer systems.
Common Uses
- • Database primary keys
- • Session identifiers
- • File names
- • API request IDs
UUID Version
This generator creates Version 4 UUIDs (random). They have a probability of collision of about 1 in 2^122.
Common Use Cases for UUIDs
- Database Primary Keys: Use UUIDs as primary keys in distributed databases to avoid ID conflicts across different servers
- Session Identifiers: Generate unique session IDs for web applications and API authentication tokens
- File Names: Create unique filenames for uploaded files to prevent collisions and overwriting
- API Request IDs: Track and debug API requests with unique identifiers for logging and tracing
- Message Queue IDs: Assign unique identifiers to messages in distributed message queues
- Transaction IDs: Generate unique transaction identifiers for financial systems and payment processing
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