Apktool M is a versatile Android application tool designed for decompiling and compiling APK files, including system applications. This comprehensive utility features a customizable text editor with syntax highlighting, tooltips, and Java source code viewing capabilities. It supports various installation file formats including APK, APKS, XAPK, and APKM, and comes with a feature-rich file manager. Notable functionalities include Antisplit for merging Android App Bundle files, custom signature creation and app signing, and quick editing of application properties such as names, package names, and icons without requiring rebuilding. The tool operates without root access and is completely free, compatible with devices running Android 4.0 and above, and contains no advertising or analytics.