MBJ
MBJ is a free, open-source Java decompiler. It can reverse-engineer Java bytecode back into readable Java source code to allow analysis and understanding of third-party applications. MBJ supports decompiling complex and obfuscated bytecode.
decompiler
bytecode
reverse-engineering
open-source
MBJ: Free, Open-Source Java Decompiler
A free, open-source Java decompiler that reverses Java bytecode into readable source code, allowing for analysis and understanding of third-party applications.
What is MBJ?
MBJ is an open-source, Java bytecode decompiler that can reverse-engineer compiled Java class files (.class files) back into human-readable Java source code. It allows developers to understand, analyze, debug, and modify the workings of Java software without access to the original source code.
Some key features of MBJ include:
- Accurate decompilation of complex and obfuscated bytecode back to readable Java code
- Preserves original naming conventions and structure as much as possible
- Handles advanced Java features like generics, varargs, annotations
- Extensible architecture to support customized output formatting
- Command line, GUI, and developer API access
- Integrations with other reverse engineering tools like JD-GUI
MBJ can decompiler everything from simple Java apps and libraries to complex enterprise systems and obfuscated bytecode. It produces syntax-correct Java source code that can be compiled again. This makes MBJ useful for security auditing, understanding legacy systems, debugging apps without source, or adapting third-party Java software to custom needs.
MBJ is free and open source under the MIT license. It works on Windows, Linux, and macOS. The code is available on GitHub with an active community contributing updates and improvements.
MBJ Features
Features
- Decompiles Java bytecode back into readable Java source code
- Supports decompiling complex and obfuscated bytecode
- Open-source and free to use
- Works on Java classes, jars and apk files
- Command line and GUI versions available
Pricing
- Free
- Open Source
Pros
Allows inspection and understanding of third-party Java code
Helps with reverse engineering and security auditing
Free and open-source
Active development and community support
Cons
Limited decompilation of very complex bytecode
May not perfectly reconstruct original source code
Slower than proprietary alternatives
Official Links
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