Build ASP.NET Web Apps Faster

Ext.NET is a component framework built with ASP.NET and Sencha Ext JS
for quicker, better web app development.

Simple code Powerful components

Ext.NET Code

  • @(Html.X().Chart()
        .Label(new SeriesLabel
            Field = new string[] { "Name" },
            Display = SeriesLabelDisplay.Rotate

Ext.NET Component

  • chart

Trusted by our customers

Everything you need to build a killer app

Plus a whole lot more
Rock solid client-server integration
Built with leading web technologies Ext JS and ASP.NET.
Rich Client API
Fully integrates with Sencha Ext JS JavaScript library.
Over 100 Components
Features over 100 Components and 500 Demos.
Large developer community
Collaborate with other Ext.NET users in the Forums.
Support you can count on
Dedicated, passionate team that's always on hand.
Get started right away
Ext.NET is free to download at any time.

Great design, baked in


Ext.NET is built on top of Sencha Ext JS, the popular UI framework. This means all our components come with great theming options, allowing your app to fit together seamlessly with any design aesthetic.

No need to have a designer or CSS expert on your team, simply choose a theme and start building great looking, usable interfaces with ease. With Ext.NET, worrying about cross-browser compatibility or user experience issues is a thing of the past.

More options for developers

Ext.NET takes the pain out of building apps. Check out the Examples Explorer to see just how easy it is to build your next app with Ext.NET.

There are over 100 components for use in your application and ASP.NET WebForms and MVC are fully supported (including Razor).


Now even easier to learn

Over 400 Pages! book

Ext.NET Web Application Development (published by Packt) makes learning Ext.NET easier than ever. Pick up a copy today and start building amazing ASP.NET applications with ease.

  • Build rich web applications using the power of Ext.NET.
  • Leverage Sencha‚Äôs popular Ext JS JavaScript framework to provide a full client-server web development experience.
  • Build polished working applications, with clear step-by-step instructions all the way.

Built for the whole web

Powered by cutting edge technologies

Always on hand

We pride ourselves on being as available as possible to Ext.NET developers.

If we're not answering questions in the Forums, we're writing about the latest Ext.NET developments in our Blog or Tweeting about upcoming releases.

If you have any questions or would like to chat, don't hesitate to get in touch.

Featured Blog Post!

SignalR with Ext.NET

SignalR promises a great evolution of real-time interactivity in web applications. It is also something that can be used with Ext.NET.

Read More