Extract text from GMD files
To convert your GMD file to another format, you need GameMaker or other Game software.
To convert other file formats to the "Asset Archive" file type, you need software like GameMaker or a similar tool.
The .GMD extension is a polymorphic container used primarily in game development and specialized video recording. It most frequently functions as a Game Message Data file for Capcom's MT Framework engine (used in titles like Monster Hunter), a 3D model container for the Persona and Yakuza series, or a level data file for Geometry Dash and GameMaker projects. A distinct, unrelated use case involves proprietary CCTV footage from Bettini surveillance systems.
A major drawback of .GMD files is their lack of interoperability. Because the extension is shared across completely different software ecosystems (Capcom, Atlus, RobTop Games, Bettini), a generic "file opener" often fails. These files are typically binary-encoded or obfuscated, meaning users cannot simply double-click to view a 3D model or read game scripts. This proprietary lock-in makes it difficult to extract assets for modding, translation, or archiving without specialized tools.
To make this data usable, conversion is necessary based on the file's origin. For game assets, the goal is often converting 3D models to OBJ or FBX for editing in Blender. For Geometry Dash levels, users convert the data to XML to modify save states. For surveillance footage, the raw stream must be converted to MP4 or AVI to be playable in standard viewers like VLC Media Player.
Convert.Guru analyzes your GMD file, detects the exact format, and lets you read the text inside.
Users also converted JSON, DMG, XML, JPG, GEX, A1, GMK and CFA files.
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 GMD converter.