Initialize with a valid key

In this document
chevron_rightEvaluation
chevron_rightPurchased license
Warning
A demo license key or a commercial license key may be required to run your PDFTron product. If you have not yet received an initialization key, please first obtain an initialization key here.

Evaluation

If you are evaluating PDFTron products, and you get an error stating that you need a valid key, then you need to request a demo license key. Once you have the demo key you add it to your PDFNet.Initialize call.

For more details please see the corresponding documentation for your platform. Android
iOS
Xamarin

Purchased license

If you have purchased a license key from PDFTron, then you would pass it into your call to PDFNet.Initialize or into your WebViewer constructor. You should have received more detail instructions in the email that sent you the purchased license key.