CFR vs Ghidra

CFR is a free Java decompiler that reconstructs Java source from Java class files. It can process individual named classes, classes found on a classpath, or a whole JAR, and the command-line tool can place output in a chosen directory with the --outputdir option. Decompilation behavior can be adjusted through command-line options or an options file. The maker says CFR handles many features from Java 9, 12, and 14, and it can attempt class files from other JVM languages; those are rendered as Java rather than their original language. CFR is written in Java 6 and is said to run wherever Java 6 does. It is available as a downloadable JAR, through Maven, and from GitHub. The FAQ notes an API from version 0.135, and the project repository identifies the license as MIT. CFR handles bytecode rather than native code. Its maker also notes that some inputs fall into edge cases where output may be poor. There are no paid plans or usage limits stated.

Ghidra is a software reverse engineering framework maintained by the NSA Research Directorate. It analyzes compiled code with tools for disassembly, assembly, decompilation, graphing and scripting, and supports many processor instruction sets and executable formats. The framework can operate interactively or in automated workflows, including work intended to address team and scale needs in complex reverse engineering. Users can write extensions and scripts in Java or Python. Development options include a GhidraDev plugin for Eclipse and support for script editing and module projects in Visual Studio Code. The project describes compiled-code analysis on Windows, macOS and Linux. Installation requires a 64-bit JDK 25 and an official multi-platform release archive. Ghidra is free under the Apache License, Version 2.0, whose terms grant no-charge, royalty-free copyright and patent licenses. The repository warns that some versions have known security vulnerabilities and directs users to security advisories. Its policy directs vulnerability reports to GitHub private vulnerability reporting rather than public issues.