UUID / GUID Generator
Generate universally unique identifiers instantly. Perfect for database keys, API testing, and distributed systems.
⚙️ Generator Settings
📋 Generated UUIDs
🔧 Advanced Output Options
✨ Key Features
Everything you need for comprehensive UUID generation
Instant Generation
Create UUIDs immediately with zero latency using cryptographic-grade random number generation
Batch Support
Generate up to 1,000 UUIDs at once, perfect for large-scale data requirements
Multiple Formats
Support for standard, compact, braces, uppercase and other format options
Flexible Export
Export as lines, comma-separated, JSON array, or CSV format
Privacy Protected
All processing happens locally in your browser - no data sent to servers
Mobile Optimized
Responsive design works perfectly on all devices and screen sizes
🎯 Perfect For
Discover how different professionals use our UUID generator
Backend Developers
Generate unique primary keys for database records, create API resource identifiers, and ensure data uniqueness in distributed systems.
QA Engineers
Generate unique identifiers for API testing, create test datasets, and simulate realistic production data.
Database Administrators
Batch generate database primary keys, create unique index values, and manage identifiers for cross-table relationships.
Security Engineers
Generate secure session IDs, create unique token identifiers, and ensure authentication system security.
📖 About UUID / GUID Generator
Understanding how UUIDs work and best practices
Our UUID/GUID Generator is a powerful, browser-based tool that creates universally unique identifiers instantly. All generation happens locally in your browser - no data is sent to any server, ensuring complete privacy and security.
🔍 UUID Structure Explained
A standard UUID consists of 32 hexadecimal digits displayed in 5 groups separated by hyphens:
550e8400-e29b-41d4-a716-446655440000 🎲 UUID v4 Random Generation
UUID v4 uses cryptographically strong random number generation, providing 2¹²² possible combinations (approximately 5.3×10³⁶). This makes collision virtually impossible in practical applications, even when generating billions of UUIDs.
❓ Frequently Asked Questions
Everything you need to know about UUID generation and usage
What is a UUID?
UUID (Universally Unique Identifier) is a 128-bit identifier used to uniquely identify information in computer systems. It's designed to be unique across space and time without requiring a central registration authority.
Can UUIDs be duplicated?
The probability of UUID duplication is extremely low. UUID v4 uses random generation with 2¹²² possible combinations (approximately 5.3×10³⁶). In practical applications, UUIDs can be considered globally unique.
How is UUID uniqueness guaranteed?
UUID v4 uses cryptographically strong random number generation. The vast number of possible combinations (2¹²² or about 5.3×10³⁶) makes collision virtually impossible in practical applications. Even generating billions of UUIDs, the probability of collision remains negligible.
What's the difference between UUID and GUID?
There is no technical difference. GUID (Globally Unique Identifier) is Microsoft's term for UUID. They refer to the same 128-bit identifier standard. The main difference is terminology - "UUID" is used in most contexts, while "GUID" is common in Windows and .NET environments.
What is UUID v4?
UUID v4 is a version that uses random or pseudo-random numbers for generation. It's the most commonly used UUID version because it's simple, doesn't require any system-specific information, and provides excellent uniqueness guarantees. Our tool generates UUID v4 by default.
Is this tool secure and private?
Yes, completely. All UUID generation happens locally in your browser using the Web Crypto API. No data is sent to any server, stored, or logged. Your generated UUIDs are private and secure.
Can I use these UUIDs in production?
Absolutely! The UUIDs generated by this tool use the same cryptographic standards as production-grade UUID libraries. They're suitable for database primary keys, API identifiers, distributed systems, and any other production use case requiring unique identifiers.
⭐ What Our Users Say
Join thousands of professionals who trust our UUID generator
"Perfect for generating database primary keys! The batch generation feature saves me tons of time when setting up test data. Clean interface and works flawlessly."
"Essential tool for API testing! I use it daily to generate unique identifiers for test cases. The multiple format options are incredibly useful for different scenarios."
"Simple, fast, and reliable. I love that it works offline and doesn't send data anywhere. The JSON export feature is perfect for my workflow. Highly recommended!"
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