What is a XBAP file?
An .XBAP file is a XAML Browser Application File created by Microsoft. It is a browser-hosted WPF (Windows Presentation Foundation) application. Developers use these files to deploy Windows applications over the internet. The .XBAP file acts as a deployment manifest. It tells the web browser how to download and execute the application using the .NET Framework.
How to open XBAP files?
Historically, users opened .XBAP files directly in browsers like Internet Explorer or via Microsoft Silverlight. Modern browsers lack native support for these technologies. Running the actual application often requires specific legacy environments or Microsoft Edge in IE Mode. However, because the .XBAP file itself is structured as XML, you can read its text and configuration contents using code editors like Visual Studio Code or Notepad++.
Best practices and troubleshooting
If you cannot run an .XBAP file, ensure you have the correct version of the .NET Framework installed on your Windows system. You must also configure your browser security settings to allow WPF applications. viewer.online/xbap analyzes .XBAP files to identify their exact format and creator software, shows which programs can open the file, and usually previews it. If an .XBAP file has multiple possible configurations, viewer.online/xbap helps identify the actual format of your file.
Software and tools
You can build and manage .XBAP files using professional developer tools like Microsoft Visual Studio. To inspect the raw configuration code, standard text editors work perfectly.
Summary
Because .XBAP files use the known XML format, viewer.online/xbap can safely open and display them online, eliminating compatibility problems.