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Sencha Ext JS JavaScript Framework for Rich Desktop Apps

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Sencha ExtJS

Modern HTML5 App Dev for the Desktop

Sencha Ext JS is the industry's most powerful desktop application development platform with unparalleled cross-browser compatibility, advanced MVC architecture, plugin-free charting, and modern UI widgets.

What is Ext JS?

What is Sencha Ext JS?

Sencha Ext JS is the leading standard for business-grade web application development. With over 100 examples, 1000 APIs, hundreds of components, a full documentation suite and built in themes, Ext JS provides the tools necessary to build robust desktop applications. Ext JS also brings a rich data package that allows developers to use a model-view-controller (MVC) architecture when building their app. The MVC leverages features like Big Data Grids enabling an entirely new level of interactivity in web apps.

Modern App Framework

Modern App Framework

Ext JS 4 is a major step forward for web frameworks. Building on Ext JS 3.3, our latest release adds over 350 new APIs, 50 new classes, and 65% more documentation. An entirely new data package equips developers to leverage features like Infinite Grid Scrolling to build an entirely new level of interactivity to web apps.

Plugin-free Charting

Plugin-free Charting

No plugins, no problem. Ext JS 4 delivers the most advanced charting and graphing capabilities of any JavaScript framework, without relying on plugins, delivering pixel perfect visuals on any browser on any operating system. Leveraging SVG and VML, the Ext JS 4 charting package lets developers design and program their graphs once for all browsers.

MVC Application Architecture

MVC Application Architecture

Ext JS 4 brings a whole new way to build client applications, by introducing the popular model-view-controller pattern to Ext JS. By allowing the separation of data management, logic and interface elements, Ext JS 4 makes it easier for even large development teams to work independently without worrying about stepping on each other's toes. Ext JS 4 ships with a helpful MVC guide to get started.

Cross Platform Browser Compatibility

Cross Platform Browser Compatibility

Ext JS 4 lets developers deliver on an incredible variety of browsers and on more operating systems using the same code — over ten years of browsers in one release. On modern browsers, Ext JS 4 utilizes HTML5 features and falls back to alternatives on older browsers. Whether you’re using Ext JS’ built-in UI components, using the Charting package, or theming your application, Ext JS 4 makes it easy to build an app that gives you the power of the web regardless of what browser your customer uses.

Ext JS supports all major web browsers including:

Internet Explorer 6+
Firefox 3.6+ (PC, Mac)
Safari 4+
Chrome 10+
Opera 11+ (PC, Mac)


Sencha Cmd

Sencha Cmd is the cornerstone to build your Sencha application. From scaffolding a new project, to minifying and deploying your application to production, Sencha Cmd provides a full set of lifecycle management features to compliment your Sencha project. With a rich command line syntax and Ant integration, Cmd is perfect to integrate into your enterprise build environment or use standalone for your application.

Documentation for Sencha Ext JS
Download Sencha Cmd