UUID Generator
Generate random UUIDs (v4) instantly in your browser.
All processing happens in your browser. Your data never leaves your device.Output will appear here...
Features
- Generate cryptographically random UUID v4 identifiers
- Bulk generation — create up to 50 UUIDs at once
- Toggle between uppercase and lowercase output
- Option to include or remove hyphens
- Uses the Web Crypto API for true randomness
How to Use the UUID Generator
- 1Set the quantity of UUIDs you want to generate (1 to 50)
- 2Choose your preferred format: uppercase/lowercase, with/without hyphens
- 3Click "Generate" to create new UUIDs
- 4Click on any UUID to copy it, or use "Copy All" for bulk copying
Frequently Asked Questions
What is a UUID?
UUID (Universally Unique Identifier) is a 128-bit identifier that is practically unique across all systems. UUID v4, which this tool generates, uses random numbers to create identifiers with an extremely low probability of collision. The format is: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx.
Is UUID the same as GUID?
Essentially yes. GUID (Globally Unique Identifier) is Microsoft's implementation of the UUID standard. They follow the same format and serve the same purpose. UUID is the more widely used term in non-Microsoft contexts.
Are the generated UUIDs truly random?
Yes. This tool uses the Web Crypto API (crypto.randomUUID()), which provides cryptographically secure random values. The generated UUIDs are suitable for use as database primary keys, session tokens, and other security-sensitive identifiers.