About UUID Generator
A UUID (Universally Unique Identifier) is a 128-bit value used to uniquely identify resources without requiring a central authority. Version 4 UUIDs are generated from random or pseudo-random numbers and are the most widely used variant in modern software. Our generator uses the browser's built-in crypto.randomUUID() API, which provides cryptographically strong randomness, ensuring that every UUID is practically guaranteed to be unique.
How to Use
Click Generate UUID to create a single identifier. If you need many at once, enter a number between 1 and 100 in the bulk count field and click Generate Bulk. Each UUID in the list has its own copy button that appears on hover. Use the Copy All button at the top to copy every UUID as a newline-separated list, ready to paste into a script, spreadsheet, or database seed file.
Key Features
- Single or bulk generation of up to 100 UUIDs at a time.
- Cryptographically secure randomness via the Web Crypto API.
- One-click copy for individual UUIDs or the entire list.
- Clean, scrollable list with hover-to-reveal copy buttons.
- Completely client-side. No data leaves your browser.
Common Use Cases
UUIDs are used as primary keys in databases (especially distributed systems where auto-increment IDs cause conflicts), as correlation IDs in microservice architectures, as unique filenames for uploads, and as session or request identifiers in logging and tracing. Generating them in the browser is particularly handy when seeding test data, prototyping schemas, or creating mock API responses during front-end development.