Setting Up Your Telerik Document Processing Libraries License Key

Starting with the Q1 2025 release, the Telerik Document Processing libraries require activation through a license key (trial or commercial). This article describes how to download and use your personal license key to activate the product.

An invalid license results in errors and warnings during build and run-time indicators such as watermarks and banners.

Downloading the License Key

The Telerik Document Processing Libraries are only distributed as a part of several Telerik bundles and are licensed only according to the terms of the bundle under which they are obtained. In the License Keys article you can find specific license key instruction for each respective bundle.

To download a license key, you must have either a developer license or a trial license. If you are new, you can sign up for a free trial first, and then follow the steps below.

1. Go to the License Keys page in your Telerik account.
2. Click the Download License Key button.

The Progress Control Panel, automated MSI installer, and the Visual Studio Extensions (if available) of each product will automatically download and store your license key in your home directory. This makes it available for all projects that you develop on your local machine.

Activating the Document Processing Libraries

To activating the Document Processing Libraries:

1. Copy the downloaded telerik-license.txt license key file to your home directory. This makes the license key available to all projects that you develop on your computer.
   1. For Windows: %AppData%\Telerik\telerik.license.txt
   2. For Mac/Linux: ~/.telerik/telerik.license.txt Alternatively, copy the telerik-license.txt license key file to the root folder of your project. This makes the license key available only to this project. Do not commit the file to source control as this is your personal license key.
2. Add the Telerik.Licensing NuGet package as a project dependency:

<PackageReference Include="Telerik.Licensing" Version="1.*" />

When you build the project, the Telerik.Licensing NuGet package automatically locates the license file and uses it to activate the product.

If your project doesn’t use NuGet packages, see Adding a License Key to Projects without NuGet References.

Adding a License Key to Projects without NuGet References

Telerik strongly recommends the use of NuGet packages whenever possible. Only include the license key as a code snippet when NuGet packages are not an option.

If you’re not using NuGet packages in your project, add the license as a code snippet:

1. Go to the License Keys page in your Telerik account.
2. On the corresponding product row, click the View key link in the SCRIPT KEY column.
3. Copy the C# code snippet into a new file, for example, TelerikLicense.cs.
4. Add the TelerikLicense.cs file to your project.

Do not publish the license key code snippet in publicly accessible repositories. This is your personal license key.

Updating Your License Key

Whenever you purchase a new license or renew an existing one, always download a new license key. The new license key includes information about all previous license purchases. This process is referred to as a license key update. Once you have the new license key, use it to activate the product.