UUID Generator (v1, v4, v7)
Generate unique UUIDs instantly - Time-based v1, Random v4, Time-ordered v7
Select a UUID version and click the button to generate!
Select your preferred UUID version from the three available options: Version 1 for time-based identifiers with MAC address information, Version 4 for purely random identifiers (recommended for general use), or Version 7 for time-ordered identifiers with improved database performance.
Click the 'Generate UUID' button to create a new unique identifier based on your selected version. The tool uses cryptographically secure random number generation and proper timestamp formatting to ensure true uniqueness and compliance with UUID standards.
Review the generated UUID in the display field, which shows the complete 36-character identifier including hyphens in the standard 8-4-4-4-12 format. The UUID version badge helps you confirm which format was generated for your specific requirements.
Copy the UUID to your clipboard using the copy button for immediate use in your applications, databases, or configuration files. The tool provides instant feedback when copying is successful, ensuring you know the identifier is ready to use.
Generate additional UUIDs by clicking the regenerate button or changing versions as needed. Each generation creates a completely unique identifier, even when using the same version multiple times.
Access your generation history to review and copy previously generated UUIDs. The tool maintains a history of your last 5 generated identifiers with their version information for easy reference.
Clear the history when working on different projects or for privacy reasons using the clear history button. This removes all stored UUIDs from the current session while maintaining the tool's functionality for new generations.
Pro Tips
- Use UUID v4 (random) for general-purpose applications, API keys, session tokens, and any scenario where you need guaranteed uniqueness without revealing timing or system information.
- Choose UUID v1 (time-based) when you need identifiers that can be sorted chronologically and don't mind including timestamp information in the identifier structure.
- Select UUID v7 (time-ordered) for database applications where you want the benefits of chronological ordering with improved database index performance and reduced fragmentation.
- Store UUIDs as binary data in databases when possible to save space and improve query performance, converting to string format only when displaying to users.
- Use the version badges in the history to quickly identify which UUID format was used for each generated identifier when working with multiple versions.
- Consider the security implications: UUID v1 reveals timestamp and MAC address information, while v4 and v7 provide better privacy through randomization of sensitive components.
Why Use This Tool?
The UUID Generator provides professional-grade unique identifier creation that serves as the backbone of modern distributed computing and data management. By supporting multiple UUID versions, it addresses diverse technical requirements from simple uniqueness to complex database optimization and chronological ordering needs. The tool's adherence to RFC 4122 standards ensures compatibility across all programming languages, databases, and platforms, eliminating integration concerns. With cryptographically secure generation methods, the UUIDs are suitable for high-security applications, session management, and sensitive data identification. The browser-based generation ensures privacy by processing entirely client-side, while the history feature enhances productivity for developers and system administrators. Whether building microservices, managing databases, or implementing IoT systems, this tool provides the reliable, standards-compliant unique identifiers essential for modern technology infrastructure, supporting everything from simple application development to complex enterprise-grade distributed systems.