A XAP file is the standard software package for Microsoft's Windows Phone operating system. Think of it as the Windows Phone equivalent of an .apk file on Android.

Some archives preserve localization files, ensuring apps can be enjoyed in languages other than English. How to Use a XAP Archive: Sideloading Guide

Connect your unlocked Windows Phone to your PC via USB and ensure the screen is unlocked. Launch the tool on your computer. Set the target to Device .

Today, XAP archives are scattered across a few key sources. While there is no single, official repository, the following are the most reliable starting points:

While exploring a Windows Phone XAP archive is highly rewarding, keep the following caveats in mind: