Free UUID Generator
Generate Universally Unique Identifiers (UUIDs) with support for time-based (v1), random (v4), and namespace-based (v5) versions.
UUID Generator
UUID v5 Configuration
Default: DNS namespace
Same name = same UUID
Click on the output area to auto-select all UUIDs
Time-based UUID
Generated using current timestamp and MAC address. Guarantees uniqueness across time and space.
Random UUID
Generated using cryptographically secure random numbers. Most commonly used UUID version.
Namespace UUID
Generated using SHA-1 hash of namespace and name. Same input always produces same UUID.
Features
RFC 4122 Compliant
All generated UUIDs follow official standards
Multiple Formats
Plain text, JSON array, or CSV output
Bulk Generation
Generate up to 50 UUIDs at once
Client-side Processing
All generation happens in your browser
Professional UUID Generator - Create Unique Identifiers Instantly
Our UUID generator is a powerful, free UUID tool designed to create Universally Unique Identifiers (UUIDs) with professional-grade reliability and speed. Whether you need to generate UUID for database primary keys, API tokens, session identifiers, or distributed system components, our online UUID generator delivers RFC 4122-compliant identifiers that guarantee uniqueness across time and space. This comprehensive unique ID generator supports multiple UUID versions and formats, making it the perfect solution for developers, database administrators, and IT professionals who require dependable identifier generation.
What sets our UUID generator apart is its versatility and ease of use. Generate single UUIDs or create up to 50 identifiers simultaneously with our bulk generation feature. The tool supports UUID versions 1 (time-based), 4 (random), and 5 (namespace-based), each serving specific use cases in modern software architecture. Our online UUID generator processes everything client-side, ensuring your data remains secure while providing instant results. With one-click copying, multiple output formats (plain text, JSON, CSV), and mobile-responsive design, this free UUID tool streamlines your development workflow and eliminates the need for complex UUID libraries in simple scenarios.
Trusted by thousands of developers worldwide, our unique ID generator combines enterprise-level functionality with user-friendly design. The tool automatically validates inputs, provides detailed error messages, and ensures all generated UUIDs conform to international standards. Whether you're building microservices, managing database schemas, or developing APIs, our UUID generator provides the reliability and performance you need to maintain data integrity and system uniqueness across your entire technology stack.
Advanced Features of Our Online UUID Generator
Our UUID generator offers comprehensive functionality that goes far beyond basic identifier creation. Experience instant UUID generation with support for multiple versions, bulk processing capabilities, and professional-grade validation. Every feature is designed to enhance your productivity while maintaining the highest standards of uniqueness and compliance.
⚡ Instant Generation & One-Click Copy
Generate UUIDs instantly with our optimized algorithms. Copy results to your clipboard with a single click, or download them in multiple formats including plain text, JSON, and CSV for seamless integration into your projects.
🔢 Multiple UUID Versions Support
Support for UUID v1 (time-based with MAC address), v4 (cryptographically secure random), and v5 (deterministic namespace-based). Each version serves specific use cases in modern software architecture and distributed systems.
📦 Bulk Generation Capability
Generate up to 50 UUIDs simultaneously for database seeding, testing environments, or large-scale applications. Perfect for developers who need multiple unique identifiers for batch operations.
🔒 Client-Side Processing & Privacy
All UUID generation happens directly in your browser using cryptographically secure methods. Your data never leaves your device, ensuring complete privacy and security for sensitive projects.
UUID Versions Explained: Choose the Right Type for Your Needs
🕐 UUID Version 1 (Time-based)
UUID v1 generates identifiers based on the current timestamp and MAC address (or random node identifier). This ensures uniqueness across both time and space, making it ideal for distributed systems where you need to guarantee no collisions.
Use cases: Database primary keys, distributed system identifiers, audit trails, timestamped records
🎲 UUID Version 4 (Random)
UUID v4 generates completely random identifiers using cryptographically secure random number generation. This is the most commonly used UUID version due to its simplicity and excellent uniqueness properties without revealing any information about the generating system.
Use cases: Session IDs, API keys, temporary identifiers, general-purpose unique IDs, security tokens
🔗 UUID Version 5 (Namespace-based)
UUID v5 generates deterministic identifiers using SHA-1 hashing of a namespace UUID and a name string. The same namespace and name combination will always produce the same UUID, making it perfect for creating consistent identifiers across different systems.
Use cases: Content addressing, reproducible identifiers, URL-to-UUID mapping, consistent cross-system references
Why Developers and IT Professionals Choose Our UUID Generator
Our free UUID tool has become the go-to solution for professionals who demand reliability, speed, and versatility in their unique identifier generation. From startup developers to enterprise architects, our online UUID generator streamlines workflows and ensures data integrity across diverse technology stacks.
👨💻 For Developers
- • Generate unique API identifiers
- • Create session and authentication tokens
- • Generate database primary keys
- • Create unique file and resource names
- • Test applications with realistic UUIDs
🗄️ For Database Administrators
- • Generate unique primary keys
- • Create consistent foreign key references
- • Populate test databases with unique data
- • Migrate data with preserved uniqueness
- • Generate partition keys for distributed databases
🏗️ For System Architects
- • Design distributed system identifiers
- • Create microservice correlation IDs
- • Generate consistent cross-service references
- • Plan UUID-based data partitioning
- • Design event sourcing identifiers
How to Generate UUID: Simple Step-by-Step Guide
Using our UUID generator is straightforward and requires no technical expertise. Follow these simple steps to generate UUID identifiers for your projects in seconds.
Select Your UUID Version
Choose from UUID v1 (time-based), v4 (random), or v5 (namespace-based) depending on your specific requirements. UUID v4 is recommended for most general purposes.
Configure Generation Settings
Set the number of UUIDs you need (1-50) and select your preferred output format (plain text, JSON, or CSV). For UUID v5, enter a namespace UUID and name string.
Generate and Copy Results
Click "Generate UUIDs" to create your unique identifiers instantly. Use the one-click copy button to add them to your clipboard or download them as a file.
Implement in Your Project
Paste the generated UUIDs directly into your code, database, configuration files, or any system requiring unique identifiers.
Frequently Asked Questions About UUID Generation
What is the difference between UUID versions, and which should I use?
UUID v1 includes timestamp and MAC address information, making it ideal for distributed systems where you need time-based ordering. UUID v4 uses random generation and is perfect for general-purpose unique identifiers like database keys and session tokens. UUID v5 creates deterministic UUIDs based on namespace and name, ensuring the same input always produces the same UUID. For most applications, UUID v4 is recommended due to its simplicity and strong uniqueness properties.
Is this UUID generator safe to use for production applications?
Yes, our UUID generator is completely safe for production use. All generation happens client-side using cryptographically secure random number generation (crypto.getRandomValues()). The UUIDs are RFC 4122 compliant and provide the same level of uniqueness as enterprise-grade UUID libraries. Your data never leaves your browser, ensuring complete privacy and security.
Can I generate multiple UUIDs at once, and what are the limits?
Our online UUID generator supports bulk generation of up to 50 UUIDs in a single operation. This feature is perfect for database seeding, testing environments, or when you need multiple unique identifiers for batch operations. The tool can output results in plain text, JSON array, or CSV format for easy integration into your projects.
How unique are the generated UUIDs, and can there be duplicates?
UUIDs generated by our tool have an extremely low probability of duplication. UUID v4 has approximately 5.3 x 10^36 possible values, making the chance of generating a duplicate practically zero. UUID v1 guarantees uniqueness through timestamp and MAC address combination, while UUID v5 produces deterministic results based on input parameters. All versions follow RFC 4122 standards for maximum reliability.
Do I need to install any software to use this UUID generator?
No installation required! Our free UUID tool is completely web-based and works in any modern browser on desktop, tablet, or mobile devices. Simply visit the page, configure your settings, and start generating UUIDs immediately. The tool works offline after initial loading, making it perfect for developers working in restricted environments.
Ready to Generate Your UUIDs?
Start using our free online UUID generator now. No registration required – just select your options and generate!
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