How to Decompile CLASS Files on Android

What is a CLASS File?

A .class file is compiled Java bytecode created from a .java source file. CLASS files are often found inside JAR archives.

CLASS Viewer and Decompiler

Jar File Opener lets you tap a .class entry and choose how to inspect it. You can view binary content in Hex mode or decompile supported class files into readable Java-like source output.

Steps to Decompile a CLASS File

1. Open a JAR file with Jar File Opener.
2. Browse the archive contents.
3. Tap a .class file.
4. Choose Decompile to Java when available.
5. Review the generated Java code output.

When Decompilation May Not Work

• The class file may be obfuscated.
• The bytecode may use unsupported or unusual features.
• The output may not match the original source code exactly.
• Some class files may only be suitable for Hex viewing.