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You can use GroupDocs.Editor without the license. The usage and functionalities are pretty much same as the licensed one but you will face few limitations while using the non-licensed API.

Evaluation Limitations

Requirements for license

  1. GroupDocs.Editor uses xml license file like any GroupDocs product.
  2. GroupDocs.Editor may work without license file in trial mode.
  3. Trial mode effects for all API.

Trial Limits

  1. Only up to 2 first pages are processed.
  2. Trial badges are placed in the document on the top of each page.


The license file contains details such as the product name, number of developers it is licensed to, subscription expiry date and so on. It contains digital signature, so don't modify the file. Even inadvertent addition of an extra line break into the file will invalidate it. You need to set a license before utilizing GroupDocs.Editor API if you want to avoid its evaluation limitations.

Calling License.SetLicense multiple times is not harmful but it wastes processor time. If you are developing a Windows Forms or console application, call License.SetLicense in your startup code, before using GroupDocs.Editor classes. 

When developing an ASP.NET application, you can call License.SetLicense from the Global.asax.cs (Global.asax.vb) file in the Application_Start protected method. It is called once when the application starts. Do not call License.SetLicense from within Page_Load methods since it means the license will be loaded every time a web page is loaded.

Applying License from File and Stream

Code below will explain how to apply product license using License File Path and File Stream.

Applying Metered License

You can also set Metered license as an alternative to license file. It is a new licensing mechanism that will be used along with existing licensing method. It is useful for the customers who want to be billed based on the usage of the API features. For more details, please refer to Metered Licensing FAQ section.

Following is the sample code demonstrating how to set metered public and private keys.

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