Extract text from OllyDbg analysis files (UDD)
To convert UDD analysis files to another format, you need OllyDbg or other Developer software.
To convert other file formats to the "Debug Data File" file type, you need software like OllyDbg or a similar tool.
The .udd file extension is most commonly an OllyDbg Debugger analysis data file. OllyDbg is an x86 assembler-level analyzing debugger heavily used in reverse engineering and malware analysis. When a researcher works on an executable, OllyDbg saves session metadata - such as custom breakpoints, memory comments, labels, and analysis data - into a .udd file. Alternatively, this extension is used by Microsoft Windows for User-mode memory dump files (User Data Dumps) containing application crash states, or by SYSPRO ERP as a User-Defined Dictionary.
Working with .udd files is highly restrictive. Because they store application-specific debugger states or raw memory dumps, they are inherently proprietary. OllyDbg files are tightly bound to the specific binary being analyzed. You cannot open them without the exact executable and the debugger itself. Standard online converters fail completely because there is no universal standard for parsing debug session data or proprietary ERP configurations. You cannot simply convert them to a PDF or DOCX document.
If you must extract information from a .udd file without the original software, your best targets are plain TXT or raw hex, though you will lose the structured context the debugger or operating system provides. This file format is notoriously difficult to process because the data structures are undocumented and closed-source. Often, only OllyDbg or Windows crash analysis tools (like WinDbg) can properly interpret the binary data.
Despite these limits, you can drag and drop your .udd file into convert.guru to identify its exact format. We can inspect the file, display its hex data, and extract readable text strings. If our analysis detects readable ASCII/Unicode labels or underlying embedded text, viewing the raw contents is instantly possible right in your browser.
Convert.Guru analyzes your UDD file, detects the exact format, and lets you read the text inside.
Users also converted UDF files.
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 "Debug Session Metadata 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 "Debug Session Metadata Storage" category.
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.