5 Best Java Decompilers Available in 2024

What is a Java Decompiler?

A Java Decompiler is a reverse engineering tool that accepts an executable java program as input and then converts it into Java code that can be easily understood by software programmers. In the case of Java language, a Decompiler will convert a .class file into a readable java source file.

A Decompiler can come in handy in case you are unable to trace your source code. You will simply decompile the program that you created and get back your Java codes. So, which Decompiler should you use? Here are the best Java Decompilers that you can use.

Also, Read: 5 Best IDE for Java Programmers

Best Java Decompilers

1. JD Project

Java Decompiler project was majorly developed for decompiling Java 5 bytecode and other versions that came later. The decompiler can be used on three major operating systems which are Windows, Mac, and Linux. One reason for its massive popularity among Java developers is the fact that it can be easily integrated with commonly-used IDEs such as IntelliJ and Eclipse.

JD Project uses JD- GUI. This is an easy-to-use and interactive graphical interface. The decompiler displays the source code during the debugging process.

2. Cavaj

Cavaj is a free Java decompiler that you can use to convert bytecode, ZIP, and JAR files into Java source code. It can also come in handy when you want to decompile Java applets. Cavaj is specially developed for the Windows operating system. This means that it may not favor you if you are using Mac or Linux.

Cavaj has an interactive user interface that gives you access to all the control features. You don’t have to download Java. The decompiler is also developed to produce accurate Java codes. It does not have bugs or any other issue that can compromise its levels of accuracy.

3. Procyon

Procyon is among the most popular open-source Java decompilers. One of its unique features is the capability to deal with Java 8. It can easily handle new features that were introduced from Java 5 to the latest version of java. Because of this reason, Procyon can be used as an alternative where other java versions fail.

Some of the things that Procyon can deal with include local classes, annotations, Switch statements, Enum declarations, and Lambdas in Java 8.

4. AndroChef Java Decompiler

AndroChef is another Java decompiler that is only available to Windows users. You can use it to decompile any java bytecode, even the ones that you think are very complex. Apart from just decompiling .class files, AndroChef can also deal with applets, JAR, DEX, and APK files. It has a user-friendly GUI that makes it an easy-to-use Java decompiler.

5. CFR Decompiler

This is another decompiler that was created to deal with modern features of the Java programming language. It can decompile new Java features such as lambdas and switch statements. This means that you don’t have to worry if you are using Java 8.

The only downside is this decompiler is not an open-source program. However, it has a command-line tool which is ideal for making the decompiling process faster and more efficient.

If you are looking for the best Java decompiler, try out any of the above decompilers.