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Free and Open Source Java project which brings together almost all the modern web tools: JsHint, CssLint, JsMin, Google Closure compressor, YUI Compressor, UglifyJs, Dojo Shrinksafe, Css Variables Support, JSON Compression, Less, Sass, CoffeeScript and much more. In the same time, the aim is to keep it as simple as possible and as extensible as …

Web Resource Optimizer for Java

Build Status

wro4j is a free and Open Source Java project which will help you to easily improve your web application page loading time. It can help you to keep your static resources (js & css) well organized, merge & minify them at run-time (using a simple filter) or build-time (using maven plugin) and has a dozen of features you may find useful when dealing with web resources.

Getting Started

In order to get started with wro4j, you have to follow only 3 simple steps.

Step 1: Add WroFilter to web.xml



Step 2: Create wro.xml

<groups xmlns="">
    <group name="all">

Step 3: Use optimized resources

    <title>Web Page using wro4j</title>
    <link rel="stylesheet" type="text/css" href="/wro/all.css" />
    <script type="text/javascript" src="/wro/all.js"/>



The documentation for this project is located on google code project page:


Found a bug? Report it to the issue tracker:


If you have any questions or suggestions, please feel free to post a comment to the discussion group:!forum/wro4j

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This project is available under the Apache License, Version 2.0.

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