You don’t necessarily need a dedicated software "converter." An XAPK is essentially a renamed ZIP archive. How to do it Rename the file extension from Use a file manager or tool like to extract the contents. Inside the extracted folder, you will find the Android folder containing the OBB data. Installation
Android requires all apps to be digitally signed. If a converter modifies an APK (e.g., merging OBB files), the original signature is invalidated. The tool must re-sign the app with a test key. xapk to apk converter