Express is a popular JavaScript library for building web applications and APIs. It is built on top of Node.js and provides a simple, lightweight, and flexible way to create web servers and applications. Express makes it easy to handle HTTP requests, routes, and middleware, and it includes a variety of features for building robust and scalable web applications. Some of the main features of Express include support for routing, middleware, and template engines, as well as the ability to easily integrate with other popular Node.js libraries. Express is widely used in the Node.js ecosystem and has a large and active community of developers.

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Top contributors all time

Tj Holowaychuk1891
Douglas Christopher Wilson1161
TJ Holowaychuk705
Jonathan Ong84
Roman Shtylman70
Aaron Heckmann54
Robert Sköld21
Blake Embrey8
Jamie Barton8
Michael Ahlers8
Guillermo Rauch7
Rakesh Bisht7
Greg Methvin6
Rand McKinney6
Aravind Nair5


Express Logo

Fast, unopinionated, minimalist web framework for Node.js.

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const express = require('express')
const app = express()

app.get('/', function (req, res) {
  res.send('Hello World')



This is a Node.js module available through the
npm registry.

Before installing, download and install Node.js.
Node.js 0.10 or higher is required.

If this is a brand new project, make sure to create a package.json first with
the npm init command.

Installation is done using the
npm install command:

$ npm install express

Follow our installing guide
for more information.


  • Robust routing
  • Focus on high performance
  • Super-high test coverage
  • HTTP helpers (redirection, caching, etc)
  • View system supporting 14+ template engines
  • Content negotiation
  • Executable for generating applications quickly

Docs & Community

PROTIP Be sure to read Migrating from 3.x to 4.x as well as New features in 4.x.

Quick Start

The quickest way to get started with express is to utilize the executable express(1) to generate an application as shown below:

Install the executable. The executable's major version will match Express's:

$ npm install -g express-generator@4

Create the app:

$ express /tmp/foo && cd /tmp/foo

Install dependencies:

$ npm install

Start the server:

$ npm start

View the website at: http://localhost:3000


The Express philosophy is to provide small, robust tooling for HTTP servers, making
it a great solution for single page applications, websites, hybrids, or public

Express does not force you to use any specific ORM or template engine. With support for over
14 template engines via Consolidate.js,
you can quickly craft your perfect framework.


To view the examples, clone the Express repo and install the dependencies:

$ git clone --depth 1
$ cd express
$ npm install

Then run whichever example you want:

$ node examples/content-negotiation


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Test Coverage

The Express.js project welcomes all constructive contributions. Contributions take many forms,
from code for bug fixes and enhancements, to additions and fixes to documentation, additional
tests, triaging incoming pull requests and issues, and more!

See the Contributing Guide for more technical details on contributing.

Security Issues

If you discover a security vulnerability in Express, please see Security Policies and Procedures.

Running Tests

To run the test suite, first install the dependencies, then run npm test:

$ npm install
$ npm test


The original author of Express is TJ Holowaychuk

The current lead maintainer is Douglas Christopher Wilson

List of all contributors