This article explains what an APK file is, how to open or install an APK file (how exactly depends on your operating system), and why converting them might not be useful.
Run/Install APK Files in Windows 10
A file with the file extension APK is a package file used to distribute apps on Google's Android operating system.
APK files are saved in ZIP format and are usually downloaded directly to Android devices, most commonly through Google Play, but they can also be found on other websites.
A typical APK file contains, among other files, the AndroidManifest.xml, classes.dex, and resources.arsc files, plus a META-INF and res folder.
