Celebrating 12 Years in business!
Build Enterprise Web Apps with 115+ UI Components
EXT.NET is an ASP.NET component framework. Boost your production speed with 115+ components and 925+ samples in the Examples Explorer.
Professionals around the world rely on Ext.NET
Thousands of developers in more than 90 countries build applications with Ext.NET.
Fortune 500 companies, banks, governments, and security organizations from around the world.
Stay connected with us
Sign up to our email newsletter and be the first to know about new releases, campaigns and news.
10,000+ hour headstart with Ext.NET
Focus on your business logic and build your UI with battle tested web components
What is Ext.NET
Support for ASP.NET Core 3 including Razor Pages and MVC projects is coming soon with Ext.NET 6.0.
Who is it for
If you are looking to build a rich, modern web application with cutting edge web technologies, unparalleled cross-browser compatibility and an advanced MVC architecture then Ext.NET is for you!
Everything you need to build a killer app
Ext.NET provides all the features you expect from a modern component framework while working on your enterprise grade web application.
Solid client-server integration
Built with leading web technologies including Ext JS and ASP.NET.
Over 115 Components
Features over 115 Components and 925+ Examples.
Support you can count on
Dedicated, passionate team that’s always on hand.
Powered by cutting edge technologies
Ext.NET is powered by the latest technologies in the industry to provide you with the highest performance and productivity.
Built for the web
Chrome Android 4.1+
IE10+ Win 8
115+ Components, 925+ code examples
Ext.NET includes 115+ components and 925+ code examples, ready to use in your ASP.NET web application. Check out the Examples Explorer to view all samples with source code.
Easy customization with built-in theme options
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.
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 115 components for use in your application and ASP.NET WebForms and MVC are fully supported (including Razor).
Learning Ext.NET is easy
Build rich web applications using the power of Ext.NET.
Build polished working applications, with clear step-by-step instructions all the way.
Always on hand
We pride ourselves on being as available as possible to Ext.NET developers. If you have any questions or would like to chat, don’t hesitate to get in touch.
What do our customers say about us
Ext.NET is trusted by thousands of developers in 90+ countries all over the world!
I am sure you hear this before but your (EXT.NET) premium support is outstanding. You go above an beyond always. Thank you for you help in our EXT upgrade.
Ext.Net is the true productivity multiplier and it is an amazing experience to discover. For that I am grateful.
Great product and great support. You all make me looked like a WIZARD when I show the sites I develop to the customer.
I just wanted to say that, without a doubt, I have never had support as great as I have had with the ext.net team after becoming a Premium Member.
I wanted to say thanks to all the great support staff at EXT! We are close to wrapping up our first project using ext.net controls, and we could not have done it without you guys.
When having premium support you get quick response here on the forum and usually in-depth examples and help which is much appreciated.