Why convert DLL to C?
A DLL (Windows PE format) contains compiled binary code - original variable names, comments, and structure are discarded by the compiler. Developers decompile DLLs when source code is lost or unavailable, when auditing third-party libraries for security, or when porting functionality to another platform.
How to convert DLL to C
dotPeek FREE
For .NET DLLs: drag the .dll onto dotPeek, browse the namespace tree, then right-click a namespace and choose Export to Project to write .cs source files to a folder.
ILSpy OPEN-SOURCE
For .NET DLLs: open via File > Open, select types in the assembly tree, then File > Save Code to export decompiled C# files.
Ghidra OPEN-SOURCE
For native DLLs: import the file, run auto-analysis, browse exports in the Symbol Tree, and view C-like pseudocode in the Decompiler pane; export via File > Export Program > C/C++.
About these formats
.DLL
Dynamic Link Library
A DLL (Dynamic Link Library) is a Windows library file holding compiled code that programs load while they run, so it is not something you open by double-clicking. If an app reports a DLL…
Open .DLL details →
.C
C Source Code File
A .c file is C source code - plain text that a programmer writes, which a compiler turns into a runnable program. Open it for reading in any text editor (Notepad++, VS Code, Vim). To…
Open .C details →Quality & what to watch
- .NET DLLs contain CIL bytecode and decompile almost perfectly to C#; native DLLs compiled from C or C++ produce only approximate pseudocode with auto-generated names like
param_1andlocal_8. - dotPeek and ILSpy produce C# (or VB.NET), not plain C; if you specifically need C, you must manually translate the output.
- Original variable names, comments, and code structure are absent from both decompiled .NET and disassembled native output - the compiler discards them.
