Developed by the NSA and released to the public, Ghidra is arguably the most powerful free decompiler available today. It is a full reverse-engineering suite that supports nearly all major architectures. Deep analysis of native C/C++ executables.
High accuracy, integrates with Visual Studio, and has a great "Process Explorer" to decompile running apps. 3. dnSpy (Open Source) How does decompiling work? - Stack Overflow
Professional features, completely free, and cross-platform. 2. dotPeek (Free)
Converts machine code into Assembly language , a low-level format that is technically readable but difficult to understand for most developers.
Goes further by reconstructing the logic into high-level code , making it much easier to analyze the program's overall behavior and structure. Best Free Tools for Decompiling EXE Files (2026)