UUID Generator
Generate random UUIDs (Universally Unique Identifiers). Free online UUID v4 generator with bulk generation support.
About UUID Generator
A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. This tool generates random UUIDs using the Version 4 specification.
Features
- Generate single or multiple UUIDs (up to 100 at once)
- UUID Version 4 (random) generation
- Option to generate with or without hyphens
- Option for uppercase or lowercase format
- Cryptographically strong random number generation
- Copy all UUIDs to clipboard
UUID Version 4 Format
UUID v4 uses random or pseudo-random numbers. The format is:
xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx
Where each x is a random hexadecimal digit (0-9, a-f) and y is one of 8, 9, a, or b.
Common Use Cases
- Database Keys: Primary keys for distributed databases
- Session IDs: Unique session identifiers
- File Names: Unique file or resource names
- API Keys: Unique identifiers for API requests
- Tracking: Event or transaction tracking IDs
Example
550e8400-e29b-41d4-a716-446655440000