UUID Generator
Generate, validate, and analyze UUIDs with advanced options. Support for UUID v1, v4, v5, v7, ULID, Short UUIDs with batch processing and multiple output formats.
Generated UUIDs
UUID Types Explained
UUID v1
Time-based UUID using timestamp and MAC address. Guaranteed uniqueness but may reveal information about when/where it was generated.
UUID v4
Random UUID with 122 bits of entropy. Most commonly used version with excellent uniqueness and no privacy concerns.
UUID v5
Name-based UUID using SHA-1 hash. Deterministic - same namespace and name always produce the same UUID.
UUID v7
Time-ordered UUID with Unix timestamp prefix. Ideal for database keys as they sort naturally by creation time.
ULID
Universally Unique Lexicographically Sortable Identifier. Base32 encoded with timestamp for natural sorting.
Short UUID
Compact Base62 encoded identifier. Shorter than standard UUIDs while maintaining good uniqueness.
Common Use Cases
🗄️ Database Design
- • Primary keys for distributed systems
- • Cross-database record synchronization
- • Avoiding auto-increment collisions
- • Natural sorting with UUID v7/ULID
🔐 Security & Privacy
- • Session tokens and API keys
- • Non-sequential identifiers
- • Preventing enumeration attacks
- • Temporary file naming
🌐 Distributed Systems
- • Microservices communication
- • Event sourcing identifiers
- • Message queue correlation IDs
- • Cache key generation
📱 Application Development
- • User ID generation
- • Resource identifiers
- • Transaction tracking
- • URL slug generation (Short UUIDs)