UUID Generator
Generate unique identifiers (UUID v4).
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UUID Generator Tool
Generate unique identifiers (UUIDs) using the cryptographically random UUID v4 algorithm. Perfect for database keys, API tokens, and unique identifiers.
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. UUIDs are often formatted as a string of 32 hexadecimal digits displayed in five groups separated by hyphens.
UUID v4 Characteristics
- Random: Generated using random numbers
- Stateless: No dependency on time or location
- Unique: Probability of collision is negligible
- Format: 36 characters including hyphens
- Example: 550e8400-e29b-41d4-a716-446655440000
Common Uses
- Database Keys: Primary keys in distributed systems
- API Tokens: Unique tokens for API authentication
- Session IDs: Unique identifiers for user sessions
- Request IDs: Tracking requests across systems
- File Names: Unique file identifiers
- Transactions: Tracking financial transactions
Why UUID v4?
UUID v4 is the most commonly used version because it relies purely on random number generation, requiring no coordination between systems. It's simple, fast, and stateless, making it ideal for distributed systems.