Delphi Decompiler Dede [UPDATED]

Whether you are auditing a piece of legacy infrastructure or unpacking an elusive piece of malware, understanding how to leverage DeDe—and its modern spiritual successors—is a vital asset for any reverse engineer.

At its core, DeDe is an analysis and decompilation tool for executables compiled with Delphi (versions 2 through 7) and C++ Builder. Borland Delphi employs a unique Visual Component Library (VCL), which embeds rich metadata—such as form designs and component relationships—directly into the final executable. DeDe reverse-engineers this structure, extracting DFM forms, reconstructing event handlers, and translating machine code into annotated assembly language.

DeDe outputs assembly code, project structures, and UI maps. It does not generate a clean, ready-to-compile .pas file. delphi decompiler dede

Events, such as a button’s OnClick or a form’s OnCreate , are stored as executable code inside the binary. DeDe locates these routines, disassembles them into x86 assembly, and attempts to provide helpful comments that reference known Delphi runtime functions. While the output is not the original Pascal source code, the annotated assembly gives analysts a solid starting point for understanding the program’s logic.

Reconstructs class hierarchies, published methods, variables, and properties. Whether you are auditing a piece of legacy

Future work on Dede could include:

For over two decades, the (often referred to simply as Dede) has been a cornerstone tool for reverse engineers, security analysts, and developers looking to understand, analyze, or recover lost Delphi source code . While newer tools exist, Dede’s speed, reliability, and specific focus on Delphi’s unique architecture make it a legendary tool in the field. Events, such as a button’s OnClick or a

One of DeDe’s standout features is its ability to extract directly from a compiled executable. Delphi forms contain layout information—size, colors, font settings, and more—as well as references to event handlers for buttons, menus, and other controls. DeDe can rebuild these forms in a format that can be opened in the Delphi IDE, effectively restoring the visual design of a lost application.

Considered the modern spiritual successor to DeDe. IDR is actively updated, supports newer Delphi versions, parses execution logic far more accurately, and can even generate highly readable, close-to-original source code code blocks.

DeDe identifies "published" methods and events, providing their entry point addresses and representing the logic in well-commented Assembly (ASM) code. Reference Tracking:

: It reads the binary file to find Delphi-specific signatures.