The dex2jar.bat file is the Windows-specific batch script included in the toolset, designed to convert Android Dalvik Executable ( .dex ) files into Java Class ( .class ) files, typically bundled as a JAR file. This process is essential for developers and security researchers who want to analyze an Android application's bytecode using standard Java decompilers. Where to Download dex2jar

To get the dex2jar.bat script, you must download the entire dex2jar package. Reliable sources include:

Inside the extracted folder, you will find several .bat files for Windows users, including d2j-dex2jar.bat .

The tool will generate a new file, usually named your-app-dex2jar.jar , in the same folder.

The primary function of this script is to transform mobile-optimized code back into a format that a desktop Java decompiler can read.