You can download the Windows version of the JAD decompiler from JavaDecompilers.com or SourceForge .
While JAD is fast, it was built for older versions of Java (up to Java 1.3 or 1.4). It often struggles with modern Java features like . For Windows 10 users working with newer Java versions, these modern alternatives are highly recommended: java-decompiler/jd-gui - GitHub
jad -sjava MyClass.class — This creates a MyClass.java file.
Since the original official site is largely inactive, you can find the JAD executable on mirror sites and developer resources:
JAD is a standalone command-line utility, so it doesn’t require a traditional "installation" wizard.
To run JAD from any folder, add its directory to your Windows System Environment Variables.
If you use the Eclipse IDE, the JadClipse plugin allows you to use JAD directly within your development environment. How to Install and Use JAD on Windows 10
