Generate Random UUID (v4)
A fast, secure, and privacy-first online tool to generate random UUID version 4 identifiers directly in your browser. No servers. No logs. No tracking.
UUID Generator Tool
About This Tool
This UUID generator creates Version 4 universally unique identifiers using your browser's built-in cryptographic API. All computation happens locally on your device, ensuring maximum speed and complete privacy.
Key Benefits of Using This Tool
- Cryptographically secure UUID v4 generation
- Runs entirely in-browser with zero data transmission
- Instant results with no latency
- Suitable for global users and offline-capable environments
- No tracking, or analytics dependencies
Features
- Generate single or multiple UUIDs at once
- Uses the Web Crypto API for maximum randomness
- One-click copy to clipboard
- Mobile-friendly and responsive design
- Lightweight, fast-loading, and SEO-optimized
Use Cases
- Generating database primary keys
- Creating unique IDs for APIs and microservices
- Session identifiers and client-side tokens
- Testing, prototyping, and mock data generation
- Distributed systems and offline-first apps
Fun Fact
A UUID v4 has 122 bits of randomness, resulting in over 5.3x1036 possible combinations-so the odds of generating the same UUID twice are astronomically low.
Historical Context
UUIDs were standardized by the Open Software Foundation in the 1990s and later formalized in RFC 4122. They were designed to enable unique identification across distributed systems without requiring central coordination-a foundational concept in modern cloud and web architectures.