What Is Express?
6 min read
What Is Express?
Express is a fast, minimal, and unopinionated web framework built on top of Node.js. It gives you the tools to build HTTP servers, REST APIs, and full web applications without imposing a strict project structure or forcing specific libraries on you.
At its core, Express wraps Node's built-in http module with a clean API for defining routes, applying middleware, and sending responses. Because it stays out of your way, it has become the most widely used Node.js framework and the foundation for more opinionated frameworks like NestJS and FeathersJS.
Why Use Express?
- Tiny surface area — learn the whole API in a weekend
- Massive ecosystem of compatible middleware packages
- Works with any database, template engine, or auth strategy
- Large community and years of production battle-testing
- Easy to integrate into existing Node projects
Express 5 is the current stable release. It introduces async error propagation and drops support for older Node versions. The examples in this track target Express 5 and Node 20+.
Ready to test yourself?
Practice Express— quiz & coding exercises