DeDe was designed for 32‑bit Win32 Delphi applications. It cannot parse 64‑bit Delphi executables, which are increasingly common in modern development. As of 2026, no version of DeDe has been adapted for x64 [citation needed].
In a standard disassembler, finding the code that runs when a user clicks a "Register" button can take hours of tracing. DeDe automates this instantly. It maps the visual components found in the form files directly to the physical memory addresses of their corresponding event handlers (e.g., Button1Click ). 3. RTTI and Class Tree Extraction
) files from the binary, allowing users to view and even edit the UI structure as if they were in the Delphi IDE.
DeDe 3.5 remains the benchmark. If you find a tutorial on "Delphi decompiler DeDe" today, it is almost always a screenshot of the classic Windows XP-style interface of DeDe 3.5. delphi decompiler dede
DeDe has not been maintained for nearly two decades. There is no official website, no bug tracker, and no developer supporting it. Users rely on community archives and reverse‑engineered modifications. This means any issues—whether with a particular binary or with modern operating systems—are unlikely to be fixed.
For event handlers, click on a procedure name in the tab. The right pane will display the disassembled code with addresses, opcodes, and comments that reference Delphi library functions. While not as readable as Pascal source, the annotated listing is far better than raw hex or undocumented assembly.
Decompiling executable files is an exercise in intellectual exploration, requiring the right tools to uncover what lies beneath the compiled surface. For the Delphi and C++ Builder ecosystems, few tools have earned as much respect among reverse engineers as —the Delphi decompiler. Whether you are a security researcher auditing binaries, a developer rescuing legacy source code, a technical writer documenting undocumented behavior, or a curious student of low‑level Windows programming, DeDe can become an essential part of your toolkit. DeDe was designed for 32‑bit Win32 Delphi applications
DeDe can generate a complete Delphi project folder that includes the . Although the PAS files contain only the disassembled event routines, the resulting structure can be loaded into the Delphi IDE. This allows an analyst to browse the forms, rename components, and even compile the reconstructed project (provided the missing logic is re‑implemented).
Using DeDe typically serves as the reconnaissance phase of a larger reverse engineering workflow. Here is how a typical session looks:
Delphi applications rely heavily on .dfm files to define the visual layout of windows, buttons, labels, and menus. DeDe can extract these embedded resources and reconstruct the visual layout of the target application's forms. This allows analysts to see exactly how the user interface is structured. 2. Event Handler Mapping In a standard disassembler, finding the code that
or Delphi source code from machine language, DeDe functions primarily as a . It analyzes the unique structure of a compiled Delphi executable (PE file) and maps out its internal architecture, making the binary drastically easier to read in a traditional disassembler. Why Delphi Binaries Require a Specialized Tool Delphi applications are unique compared to standard
The tool identifies class hierarchies, Virtual Method Tables (VMTs), and event registrations embedded in the binary. Because the UI metadata remains intact to generate the interface at runtime, DeDe decodes the RTTI to pinpoint precisely which assembly subroutine triggers when a specific button is clicked. ⚖️ DeDe vs. Interactive Delphi Reconstructor (IDR)
Understanding Delphi Decompiler DEDE: The Classic Tool for Reverse Engineering Delphi Applications