UUID Generator
Generate random UUIDs (v4) instantly.
Click the Generate button to create random UUIDs (Version 4). Generate one or multiple UUIDs at once. Everything runs in your browser.
Was this tool helpful?
What is UUID Generator?
UUID Generator is a free tool that creates Universally Unique Identifiers (UUIDs), also known as GUIDs. It generates Version 4 UUIDs, which are random and cryptographically secure.
When Should You Use This Tool?
Use this tool when you need unique identifiers for databases, APIs, testing, or any system that requires globally unique IDs.
How to Use UUID Generator
- 1Click "Generate UUID" to create a single UUID.
- 2Adjust the quantity to generate multiple UUIDs at once.
- 3Choose the format (uppercase, lowercase, with/without hyphens).
- 4Copy the result using the Copy button.
How Does This Tool Work?
This tool uses the Web Crypto API (crypto.randomUUID) when available, falling back to a cryptographically secure random implementation. UUIDs are generated locally in your browser.
Privacy Note: Runs entirely in your browser. Your data never leaves your device. No file uploads to any server.
Common Use Cases
Developers
Create unique IDs for database records and API resources.
Testers
Generate test data with unique identifiers.
System Architects
Design distributed systems with globally unique IDs.