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    Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jade, coffee, css, less, ... and your custom stuff.
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    Webpack is a module bundler. Its main purpose is to bundle JavaScript files for usage in a browser, yet it is also capable of transforming, bundling, or packaging just about any resource or asset.

    Table of Contents

    1. Install
    2. Introduction
    3. Concepts
    4. Contributing
    5. Support
    6. Core Team
    7. Sponsoring
    8. Premium Partners
    9. Other Backers and Sponsors
    10. Gold Sponsors
    11. Silver Sponsors
    12. Bronze Sponsors
    13. Backers
    14. Special Thanks


    Install with npm:

    npm install --save-dev webpack

    Install with yarn:

    yarn add webpack --dev


    Webpack is a bundler for modules. The main purpose is to bundle JavaScript files for usage in a browser, yet it is also capable of transforming, bundling, or packaging just about any resource or asset.


    • Bundles ES Modules, CommonJS, and AMD modules (even combined).
    • Can create a single bundle or multiple chunks that are asynchronously loaded at runtime (to reduce initial loading time).
    • Dependencies are resolved during compilation, reducing the runtime size.
    • Loaders can preprocess files while compiling, e.g. TypeScript to JavaScript, Handlebars strings to compiled functions, images to Base64, etc.
    • Highly modular plugin system to do whatever else your application requires.

    Get Started

    Check out webpack's quick Get Started guide and the other guides.

    Browser Compatibility

    Webpack supports all browsers that are ES5-compliant (IE8 and below are not supported). Webpack also needs Promise for import() and require.ensure(). If you want to support older browsers, you will need to load a polyfill before using these expressions.



    Webpack has a rich plugin interface. Most of the features within webpack itself use this plugin interface. This makes webpack very flexible.

    Name Status Install Size Description
    mini-css-extract-plugin mini-css-npm mini-css-size Extracts CSS into separate files. It creates a CSS file per JS file which contains CSS.
    compression-webpack-plugin compression-npm compression-size Prepares compressed versions of assets to serve them with Content-Encoding
    html-webpack-plugin html-plugin-npm html-plugin-size Simplifies creation of HTML files (index.html) to serve your bundles
    pug-plugin pug-plugin-npm pug-plugin-size Renders Pug files to HTML, extracts JS and CSS from sources specified directly in Pug.


    Webpack enables the use of loaders to preprocess files. This allows you to bundle any static resource way beyond JavaScript. You can easily write your own loaders using Node.js.

    Loaders are activated by using loadername! prefixes in require() statements, or are automatically applied via regex from your webpack configuration.


    Name Status Install Size Description
    val-loader val-npm val-size Executes code as module and considers exports as JS code


    Name Status Install Size Description
    cson-npm cson-size Loads and transpiles a CSON file


    Name Status Install Size Description
    babel-npm babel-size Loads ES2015+ code and transpiles to ES5 using Babel
    type-npm type-size Loads TypeScript like JavaScript
    coffee-npm coffee-size Loads CoffeeScript like JavaScript


    Name Status Install Size Description
    html-npm html-size Exports HTML as string, requires references to static resources
    pug-npm pug-size Loads Pug templates and returns a function
    pug3-npm pug3-size Compiles Pug to a function or HTML string, useful for use with Vue, React, Angular
    md-npm md-size Compiles Markdown to HTML
    posthtml-npm posthtml-size Loads and transforms a HTML file using PostHTML
    hbs-npm hbs-size Compiles Handlebars to HTML


    Name Status Install Size Description
    <style> style-npm style-size Add exports of a module as style to DOM
    css-npm css-size Loads CSS file with resolved imports and returns CSS code
    less-npm less-size Loads and compiles a LESS file
    sass-npm sass-size Loads and compiles a Sass/SCSS file
    stylus-npm stylus-size Loads and compiles a Stylus file
    postcss-npm postcss-size Loads and transforms a CSS/SSS file using PostCSS


    Name Status Install Size Description
    vue-npm vue-size Loads and compiles Vue Components
    polymer-npm polymer-size Process HTML & CSS with preprocessor of choice and require() Web Components like first-class modules
    angular-npm angular-size Loads and compiles Angular 2 Components
    riot-npm riot-size Riot official webpack loader
    svelte-npm svelte-size Official Svelte loader


    Webpack uses async I/O and has multiple caching levels. This makes webpack fast and incredibly fast on incremental compilations.

    Module Formats

    Webpack supports ES2015+, CommonJS and AMD modules out of the box. It performs clever static analysis on the AST of your code. It even has an evaluation engine to evaluate simple expressions. This allows you to support most existing libraries out of the box.

    Code Splitting

    Webpack allows you to split your codebase into multiple chunks. Chunks are loaded asynchronously at runtime. This reduces the initial loading time.


    Webpack can do many optimizations to reduce the output size of your JavaScript by deduplicating frequently used modules, minifying, and giving you full control of what is loaded initially and what is loaded at runtime through code splitting. It can also make your code chunks cache friendly by using hashes.


    We want contributing to webpack to be fun, enjoyable, and educational for anyone, and everyone. We have a vibrant ecosystem that spans beyond this single repo. We welcome you to check out any of the repositories in our organization or webpack-contrib organization which houses all of our loaders and plugins.

    Contributions go far beyond pull requests and commits. Although we love giving you the opportunity to put your stamp on webpack, we also are thrilled to receive a variety of other contributions including:

    • Documentation updates, enhancements, designs, or bugfixes
    • Spelling or grammar fixes
    • corrections or redesigns
    • Adding unit, or functional tests
    • Triaging GitHub issues -- especially determining whether an issue still persists or is reproducible.
    • Searching #webpack on twitter and helping someone else who needs help
    • Teaching others how to contribute to one of the many webpack's repos!
    • Blogging, speaking about, or creating tutorials about one of webpack's many features.
    • Helping others in our webpack gitter channel.

    To get started have a look at our documentation on contributing.

    If you are worried or don't know where to start, you can always reach out to Sean Larkin (@TheLarkInn) on Twitter or simply submit an issue and a maintainer can help give you guidance!

    We have also started a series on our Medium Publication called The Contributor's Guide to webpack. We welcome you to read it and post any questions or responses if you still need help.

    Looking to speak about webpack? We'd love to review your talk abstract/CFP! You can email it to webpack [at] opencollective [dot] com and we can give pointers or tips!!!

    Creating your own plugins and loaders

    If you create a loader or plugin, we would <3 for you to open source it, and put it on npm. We follow the x-loader, x-webpack-plugin naming convention.


    We consider webpack to be a low-level tool used not only individually but also layered beneath other awesome tools. Because of its flexibility, webpack isn't always the easiest entry-level solution, however we do believe it is the most powerful. That said, we're always looking for ways to improve and simplify the tool without compromising functionality. If you have any ideas on ways to accomplish this, we're all ears!

    If you're just getting started, take a look at our new docs and concepts page. This has a high level overview that is great for beginners!!

    Looking for webpack 1 docs? Please check out the old wiki, but note that this deprecated version is no longer supported.

    If you want to discuss something or just need help, here is our Gitter room where there are always individuals looking to help out!

    If you are still having difficulty, we would love for you to post a question to StackOverflow with the webpack tag. It is much easier to answer questions that include your webpack.config.js and relevant files! So if you can provide them, we'd be extremely grateful (and more likely to help you find the answer!)

    If you are twitter savvy you can tweet #webpack with your question and someone should be able to reach out and help also.

    If you have discovered a 🐜 or have a feature suggestion, feel free to create an issue on Github.


    FOSSA Status

    Core Team

    Tobias Koppers


    Founder of webpack

    Johannes Ewald

    Loaders & Plugins

    Early adopter of webpack

    Sean T. Larkin

    Public Relations

    Founder of the core team

    Kees Kluskens




    Most of the core team members, webpack contributors and contributors in the ecosystem do this open source work in their free time. If you use webpack for a serious task, and you'd like us to invest more time on it, please donate. This project increases your income/productivity too. It makes development and applications faster and it reduces the required bandwidth.

    This is how we use the donations:

    • Allow the core team to work on webpack
    • Thank contributors if they invested a large amount of time in contributing
    • Support projects in the ecosystem that are of great value for users
    • Support projects that are voted most (work in progress)
    • Infrastructure cost
    • Fees for money handling

    Premium Partners

    Other Backers and Sponsors

    Before we started using OpenCollective, donations were made anonymously. Now that we have made the switch, we would like to acknowledge these sponsors (and the ones who continue to donate using OpenCollective). If we've missed someone, please send us a PR, and we'll add you to this list.

    Angular MoonMail MONEI

    Gold Sponsors

    Become a gold sponsor and get your logo on our README on Github with a link to your site.

    Silver Sponsors

    Become a silver sponsor and get your logo on our README on Github with a link to your site.

    Bronze Sponsors

    Become a bronze sponsor and get your logo on our README on Github with a link to your site.


    Become a backer and get your image on our README on Github with a link to your site.

    Special Thanks to

    (In chronological order)

    Show All