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XAP is the file format for:

  1. mobile apps for the Windows Phone operating system
  2. Silverlight web apps

Since the relase of Windows Phone 8.1 XAP was replaced by the the APPX file format used to install WinRT apps on the Windows Phone Support.

A XAP file is a ZIP file, but which has the xap file extension (not zip).

The MIME type for XAP files is: appilcation/x-silverlight-app.

Microsoft later enabled the possibility to encrypt the XAP file. A standard ZIP extractor does not work for encrypted XAP files.

  • Fortunately, the XAP file of Speedy Blupi is not encrypted and can be opened as a standard ZIP file.

Content of a XAP file

  • AppManifest.xaml file
  • DLLs, which are required
  • Application / Game resources (images and others)