Click the "Select File" button above, and choose your UDD file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert UDD to another file type
To convert your UDD file to another format, you need OllyDbg or other Developer software.
Convert a file to UDD
To convert other file formats to the "Debugging Data File" file type, you need software like OllyDbg or a similar tool.
About UDD files
The .UDD file extension is primarily associated with OllyDbg, a legendary 32-bit assembler-level debugger for Microsoft Windows. These files serve as the persistent memory for the debugger; whenever you analyze a module (like an EXE or DLL), OllyDbg creates a corresponding .UDD file to store your breakpoints, custom labels, code comments, and analysis history.
However, users often hit a wall because the .UDD format is a proprietary binary database. You cannot simply double-click to view your notes in Notepad, and the file structure is often version-specific (e.g., files created in v1.10 may crash v2.01). Furthermore, as the industry moves toward 64-bit debugging with tools like x64dbg or IDA Pro, legacy .UDD data becomes a locked silo.
For preservation and documentation, the best approach is to convert the internal data into readable text formats like TXT or CSV. For migration, specialized scripts can convert .UDD structures into map files (MAP) or import scripts for newer debuggers.
Convert.Guru analyzes your UDD file, detects the exact format, and lets you read the text inside.
If you want to convert UDD file to DB, SQLITE, SQLITE3, MDB, ACCDB, DBF, ODB, FDB, GDB, MYD, FRM or SQL, you can use OllyDbg or similar software from the "Debugger Analysis Storage" category. In the File menu, look for Save As… or Export….
To convert NDF, SQLITE3, BAK, RDB, SQL, DB4, MDF, MDB, LDF, DB, DB3 or SQLITE files to UDD, try OllyDbg or another comparable tool in the "Debugger Analysis Storage" category.
The UDD Converter Story
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our UDD converter.