Disclaimer: Use this educational guide only on software you own or have explicit permission to analyze.
Step 1: Acquiring DeDe The original DeDe (by DaFixer) is obsolete. The modern, maintained fork is often called DeDeDlphi or DeDe 3.50. You can find it on reverse engineering repositories (like GitHub or tools.ru). It is a lightweight executable (~2 MB) that requires no installation.
Step 2: Loading the Target
Step 3: Analyzing the Structure After loading, you will see a tabbed interface: delphi decompiler dede
Step 4: Extracting the DFM (Form) Right-click a form and select "Decompile Form" or "Save as DFM". DeDe will output a human-readable text file. Example output:
object LoginForm: TLoginForm
Left = 200
Top = 150
Caption = 'Administrator Login'
object btnLogin: TButton
Caption = '&Login'
OnClick = btnLoginClick <-- Event hook identified
end
end
Step 5: Finding the Code Address
Click on the Procedures tab. Find btnLoginClick. DeDe shows:
Address: 00451234 (Virtual Address). You can now load the EXE into a debugger (x64dbg or OllyDbg), go to 00451234, and set a breakpoint.
While the "Delphi decompiler DeDe" is powerful, it has severe constraints: Disclaimer: Use this educational guide only on software
Delphi has long occupied a special place in the world of software: a rapid RAD environment, a beloved IDE for Pascal fans, and the engine behind countless legacy desktop applications. But as executables age, documentation disappears, and source code gets lost, a persistent need arises: how do you understand, recover, or audit a compiled Delphi program? Enter the Delphi decompiler landscape — and with it, the tool often called "d e d e" (Delphi DEcompiler), a name that evokes both simplicity and mystery.
| Feature | Description | |---------|-------------| | DFM extraction | Recovers form definitions (component tree, properties). | | Event detection | Lists all event handlers linked to components. | | Method analysis | Shows addresses, sizes, and names of methods. | | Pseudo-code generation | Produces a Pascal-like representation of assembly code (basic but readable). | | Resource viewing | Extracts strings, icons, and other resources. | | Support | Delphi 2 – 2007 / C++ Builder 3 – 6 (older versions only). |
The original developer stopped working on DeDe around 2006. However, the open-source community has kept it alive via patches. The rise of LLM-based reverse engineering (like ChatGPT/Gemini analyzing assembly) has made pure decompilers less critical. Step 3: Analyzing the Structure After loading, you
Yet, for specific scenarios—recovering a lost form from a 2003 Delphi 5 binary on a legacy Windows XP machine—nothing beats DeDe. It is the Rosetta Stone for old Delphi binaries.
Decompilation can be used for legitimate recovery, security research, interoperability, or learning. It can also be misused to pirate software or uncover proprietary algorithms. Always ensure you have the legal right to analyze a binary before proceeding, and respect licensing and intellectual property.
If you need to write a hook for an old Delphi DLL, DeDe reveals the exported function names and parameter expectations (through RTTI analysis).
| Version | Notes | |---------|-------| | DeDe 2.x | Early public release – command line oriented. | | DeDe 3.0 – 3.5 | GUI interface added; most widely used version. | | DeDe 3.50.04 Beta | Last known release (approx. 2004–2005). | | DeDe 4 (unfinished) | Rumored but never officially released. |
After 2005, development ceased. The tool is considered abandonware. A number of forks or similar tools appeared (e.g., IDR – Interactive Delphi Reconstructor) but DeDe remains notable for its simplicity and focus on Delphi-specific structures.