🔑 Generate RFC 4122 compliant UUIDs with multiple versions and formats. Perfect for databases, APIs, and distributed systems! ⚡️🚀
UUID Version
Random UUID (most commonly used, cryptographically secure)
Generation Settings
Output Format
Standard format with dashes (xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx)
Ready to Generate UUIDs
Configure your settings above and click generate to create secure, unique identifiers.
UUID Generator
Universally Unique Identifiers (UUIDs) are essential for creating unique identifiers in distributed systems, databases, and applications. Our comprehensive UUID generator supports multiple versions and output formats to meet any development requirement.
Key Features:
Multiple UUID Versions: Generate UUID v1 (timestamp-based) and UUID v4 (random) with proper RFC 4122 compliance.
Flexible Output Formats: Standard with dashes, no dashes, uppercase, braces, brackets, and uppercase variants.
Bulk Generation: Create up to 100 UUIDs at once for batch operations and bulk data initialization.
Instant Copy: One-click copying for individual UUIDs or copy all generated UUIDs at once.
Export Options: Download generated UUIDs as text files with versioned naming for easy organization.
Real-time Formatting: See exactly how your UUIDs will appear in different formats before generation.
Version Information: Clear descriptions of each UUID version and their ideal use cases.
UUID Versions Explained:
UUID v4 (Random)
The most commonly used UUID version. Generated using cryptographically secure random numbers, providing excellent uniqueness with minimal collision probability.
122 bits of randomness
Cryptographically secure
No dependence on system clock or MAC address
Perfect for distributed systems
Ideal for database primary keys
UUID v1 (Timestamp-based)
Generated using current timestamp and MAC address. Provides natural ordering and can be sorted chronologically, making it useful for time-series data.
Includes timestamp information
Naturally sortable by creation time
Contains MAC address component
Useful for audit trails
Great for time-series databases
Output Formats:
Standard: 550e8400-e29b-41d4-a716-446655440000 - RFC 4122 compliant format
No Dashes: 550e8400e29b41d4a716446655440000 - Compact format for databases
Uppercase: 550E8400-E29B-41D4-A716-446655440000 - For case-sensitive systems
With Braces: {550e8400-e29b-41d4-a716-446655440000} - Microsoft GUID format
With Brackets: [550e8400-e29b-41d4-a716-446655440000] - Alternative enclosure format
Common Use Cases:
Database Primary Keys: Create unique, non-sequential primary keys for distributed databases and microservices.
API Request IDs: Generate unique identifiers for API requests, transactions, and logging correlation.
Session Management: Create secure session identifiers for web applications and user authentication systems.
File and Document IDs: Generate unique identifiers for files, documents, and digital assets in content management systems.
Message Queue IDs: Create unique message identifiers for distributed messaging systems and event-driven architectures.
Microservices Communication: Generate correlation IDs for tracking requests across multiple microservices.
Cloud Resource Naming: Create unique names for cloud resources, containers, and infrastructure components.
Testing and Development: Generate sample data identifiers for testing, prototyping, and development environments.
Best Practices:
Choose the Right Version: Use UUID v4 for most applications, UUID v1 when chronological ordering is important.
Consistent Formatting: Stick to one format throughout your application to maintain consistency.
Database Storage: Consider using BINARY(16) storage for UUIDs in databases to save space and improve performance.
Index Considerations: Be aware that random UUIDs (v4) can impact database index performance compared to sequential IDs.
Security: Never rely on UUIDs for security purposes - they are identifiers, not secrets.
Validation: Always validate UUID format in your applications to ensure data integrity.
Technical Specifications:
RFC 4122 Compliant: All generated UUIDs follow the official RFC 4122 specification for maximum compatibility.
128-bit Identifiers: Each UUID is exactly 128 bits (16 bytes) long, providing vast uniqueness space.
Version Bits: Proper version and variant bits are set according to the RFC specification.
Collision Probability: For UUID v4, the probability of collision is approximately 1 in 5.3 x 10^36.
Cross-Platform: Generated UUIDs work across all platforms, languages, and database systems.
Why Use This Tool?
Instant Generation: Generate UUIDs immediately in your browser without server round-trips.
Privacy Focused: All generation happens locally - no UUIDs are sent to external servers.
Multiple Formats: Support for all common UUID formats used across different platforms and languages.
Developer Friendly: Perfect for developers who need reliable UUID generation during development and testing.
Bulk Operations: Generate multiple UUIDs at once for database seeding and batch operations.
Export Ready: Easy copy and download functionality for integrating UUIDs into your projects.
Always Available: Works offline once loaded, perfect for development environments without internet access.
Free and Unlimited: No registration, no limits, no premium features - completely free to use.
Whether you're building distributed systems, designing database schemas, or developing APIs that require unique identifiers, our UUID generator provides the reliability, flexibility, and ease of use you need to create professional-grade unique identifiers.