How to decompile DEX into Java source code?

To decompile DEX (Dalvik Executable) files into Java source code, you can use a DEX decompiler such as JD-GUI or DEX2JAR.

  1. JD-GUI:
  • Download and install JD-GUI from the official website (
  • Launch JD-GUI and open the DEX file by going to "File > Open" or by dragging and dropping the DEX file into the JD-GUI window.
  • JD-GUI will decompile the DEX file and display the Java source code in a new window.
  1. DEX2JAR:
  • Download and install DEX2JAR from the official website (
  • Open a command prompt and navigate to the DEX2JAR installation directory.
  • Run the following command to convert the DEX file to a JAR file:
d2j-dex2jar.bat <dex file>
  • The JAR file will be created in the same directory as the DEX file, with a ".jar" extension.
  • You can then use a Java decompiler such as JD-GUI to decompile the JAR file into Java source code.

Keep in mind that decompiling DEX files is not an exact science, and the quality of the decompiled source code may vary depending on the complexity of the DEX file and the capabilities of the decompiler. The decompiled source code may not always be 100% accurate, and you may need to make manual adjustments to the code to make it work properly.