Frequently Asked Questions

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Each Ext.NET license purchased includes free upgrades for all minor versions. Upgrading from version 4.0 to 4.1 to 4.x would all be free.

The Ext.NET license key will also unlock prior releases, such as all version 3.x builds with an Ext.NET 4 license key.

The Ext.NET license is a perpetual license and does not expire. Major version upgrades, such as from 3.x to 4.x, would require a new Ext.NET license.

Each Ext.NET license includes a minimum of one year Premium Support and GitHub access to the full Ext.NET source code (C#). At the end of your term, you can extend your Premium Support benefits by renewing. The Ext.NET license itself does not expire or become invalidated if Premium Support is not renewed. Two-year Premium Support is also available.

Ext.NET is licensed per Developer or sometimes called per seat licensing. Each individual working directly with Ext.NET in an IDE (such as Visual Studio, Visual Web Developer Express or similar) is considered a Developer. Each Developer is granted the right to install and use Ext.NET on workstations used by that Developer for development purposes and to deploy Ext.NET on unlimited domains, sub-domains and servers.

Each Ext.NET Enterprise purchase licenses up to Five developers within your organization. This allows for up to five developers to install and use Ext.NET on one or more workstations for development and to deploy web applications built with Ext.NET on unlimited domains and sub-domains hosted on unlimited servers.

Ext.NET license Packs can be combined to make other quantities greater than Five. Please email Ext.NET Support if you would like a combination of products summarized on one Quote.

You will not owe royalties for Your distribution of the Software is done in accordance with the Ext.NET License Agreement.

The Ext.NET license includes a “Trial License” which will work unrestricted on http://localhost or Once uploaded to a web server, the framework will still function unrestricted, although will display an ‘Unlicensed’ message. The trial license does not expire, so you can take your time to determine if Ext.NET is suitable for your project before purchasing a License Key.

No functionality is disabled with the trial license.

Once your Ext.NET license key has been added to your application, the ‘Unlicensed’ message will be automatically removed.

An Ext.NET license is required for all Ext.NET enabled applications, both internally accessed (intranet or network) and externally accessed (internet or extranet).

Each person on your team modifying Ext.NET code requires a license. An Ext.NET Enterprise license covers the first five people on your team. The Ext.NET Enterprise license can be purchased directly from the Store.

No. The Ext.NET license includes support for both Ext.NET Web Forms and Ext.NET MVC. A separate license for each is not required. Ext.NET also ships with an advanced Charting package, which is also supported in ASP.NET Web Forms and ASP.NET MVC. The Charting package is included in the Ext.NET license.
Yes. The Ext.NET license includes the right to use the Sencha Ext JS library as a part of Ext.NET, subject to the terms of the License Agreement. You do not require a separate Sencha Ext JS Commercial License to use Ext.NET, as rights are included to use Ext JS in commercial projects when used in conjunction with Ext.NET. The Ext JS library that is shipped with Ext.NET cannot be used separately from Ext.NET, such as in a pure JavaScript only Ext JS application.

The current release of Ext JS included with each release of Ext.NET is outlined on the download page.

Unfortunately, we are unable to offer any discounts on Ext.NET licenses. If you have any questions or comments, please feel free to contact our sales team directly (
Yes, although you must contact with your request to purchase using a Purchase Order. You will be provided with a custom checkout option from the Store.

Purchases made directly from the Ext.NET Store will be presented with several Payment Options, including the following:

  • Credit card
  • PayPal
  • Wire transfer
  • Check/Money order

You may be presented with country specific payment options, such as country specific credit card options.

Once the full payment has been received, your official Ext.NET license key will be delivered by email. All Ext.NET payment processing, including credit card and wire transfer payments, are provided by Cleverbridge. Once Cleverbridge has received full payment, they will notify our licensing system and your official Ext.NET License Key will be generated.

We do not deliver license keys until full payment has been received and confirmed.

We are not able to provide a refund once an Ext.NET License Key has been delivered to you. Please take your time evaluating Ext.NET with the Trial License before proceeding with a purchase.
Read-only access to the Ext.NET Svn source code repository is included with all Premium Support subscriptions. If a Premium Support subscription expires, access to the Svn server will be removed.

The Svn source code repository provides access to the full source code of Ext.NET and the Ext.NET Examples Explorer. Svn includes all prior releases (/tags), the current development branch (/trunk), and if a vNext major version is being developed (/branches). The full commit log of Ext.NET going back to 2008 is available from Svn.

The recent (last 100) commit log is available to view online.

When a Premium Support subscription is purchased, you will be issued custom credentials to access the Svn source code server. These credentials will be different than your Ext.NET Forum credentials.

To connect to the Svn server, we recommend using Tortoise SVN (tutorial).

More information regarding the Ext.NET Svn source code server is available at