Generate UUID Online Free
Create cryptographically random UUID v4 identifiers instantly. This free tool generates universally unique identifiers directly in your browser using the Web Crypto API, ensuring true randomness without any server communication.
Example Output
Generated UUIDs:
550e8400-e29b-41d4-a716-446655440000
6ba7b810-9dad-11d1-80b4-00c04fd430c8
f47ac10b-58cc-4372-a567-0e02b2c3d479Common Use Cases
- Creating primary keys for database records
- Generating unique session or request identifiers
- Assigning correlation IDs for distributed tracing
- Creating unique filenames for uploaded assets
Frequently Asked Questions
- Are these UUIDs truly random?
- Yes. The tool uses the browser's Web Crypto API (crypto.getRandomValues), which provides cryptographically secure random numbers. This is the same source of randomness used for TLS and other security-critical operations.
- Can I generate multiple UUIDs at once?
- Yes. You can specify how many UUIDs to generate in a single batch, and copy them all to your clipboard or download them as a text file.
- What UUID version is generated?
- The tool generates UUID v4 (random) by default. Version 4 UUIDs are the most commonly used type, consisting of 122 random bits with fixed version and variant indicators.
100% Private & Secure
This tool runs entirely in your browser. Your files and data never leave your device.