GUID V4 - Random-Based Identifier (Recommended)
GUID v4 is the most widely used random-based identifier. Learn about its structure, collision probability, advantages and why it is recommended for general-purpose applications.
How to Generate UUIDs with npm
Install UUID support with npm when you want one package interface for UUID v4 and UUID v7 across JavaScript and TypeScript projects.
Recommendation: use npm when you want one package that works in frontend and backend JavaScript or TypeScript projects.
How to install UUID support with npm
npm install uuidHow to generate UUID v4 with an npm package
import { v4 as uuidv4 } from 'uuid';
const id = uuidv4();
console.log(id);How to generate UUID v7 with an npm package
import { v7 as uuidv7 } from 'uuid';
const id = uuidv7();
console.log(id);Native support notes
- npm only distributes packages. Generation happens inside your runtime.
- The
uuidpackage is a common choice when you want the same API across environments. - Be explicit about ESM vs CommonJS usage in project documentation.
Practical notes
- Use npm package-based generation when runtime support is inconsistent.
- Prefer native
crypto.randomUUID()if you only need v4 and want fewer dependencies. - See the Node.js guide and the JavaScript guide for runtime-specific examples.
Frequently Asked Questions
No. npm installs a package, and your application runtime executes the actual UUID generation code.
The package gives you one consistent API and covers UUID versions such as v7 that are not usually native.
Learn more
These articles expand on related concepts, formats and practical considerations.