CFR
CFR is an open-source Java library and set of tools that allow you to view, edit, and analyze the bytecode of Java applications. It can decompile Java bytecode back into Java source code for debugging and understanding purposes.
java
bytecode
decompiler
open-source
CFR: Open-Source Java Library for Bytecode Analysis
A comprehensive toolset for viewing, editing, and analyzing Java bytecode, including decompilation of source code for debugging and understanding purposes.
What is CFR?
CFR (Cava Forehead Recipes) is an open-source Java library and set of tools that allow you to view, edit, and analyze the bytecode of Java applications. It was created by Lee Benfield and is distributed under the MIT license.
CFR can take compiled Java class files and decompile them back into human-readable Java source code. This allows developers to understand, debug, optimize, and modify the logic of Java applications without access to the original source code.
Some key features and capabilities of CFR include:
- Accurate and lossless Java decompilation - CFR aims to perfectly regenerate valid Java source code from bytecode
- Handles complex and obfuscated bytecode
- Preserves original formatting, variable names, comments, etc. when possible
- Advanced control flow analysis algorithms
- IDE plugin available for seamless integration
- Modular architecture - can be extended and customized
- Command line and API access for automation
- Performs bytecode verification
- Supports latest Java versions and language features
CFR is commonly used for security auditing, malware analysis, tool integration, code understanding, and assisting with migration for legacy systems. It provides an essential view into compiled Java applications.
CFR Features
Features
- Decompiles bytecode back to Java source code
- Allows editing and analysis of bytecode
- Provides a Java API for working with bytecode programmatically
- Supports debugging and understanding Java applications
- Performs control flow analysis
- Works with Java 8 and below
Pricing
- Open Source
Pros
Helps understand obfuscated or unfamiliar code
Enables low-level analysis and modification of bytecode
Free and open source
Active community support
Cons
Limited support for newer Java versions
Decompilation not perfect, may require manual fixes
Steep learning curve
Official Links
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