Click the "Select File" button above, and choose your CSM file.
You'll see a preview.
Click the "Convert file to..." button to save your file in the format you want.
Convert CSM to another file type
The converter easily converts your CSM cache files to various formats - free and online. No Steam or or other Game software needed.
CSM to OBJ
CSM to FBX
CSM to 3DS
CSM to STL
CSM to PLY
CSM to STP
CSM to ASSBIN
CSM to GLB
CSM to 3MF
CSM to X3D
CSM to X
CSM to GLTF
Convert a file to CSM
To convert other file formats to the "Game Depot Cache File" file type, you need software like Steam or a similar tool.
About CSM files
A .CSM file is primarily used as a Steam Depot Cache file by the Steam gaming platform to store fragmented downloaded game data before installation. Alternatively, the .CSM extension is heavily utilized by Garmin devices as proprietary GPS map files, and by MySQL as table metadata for its CSV storage engine. You might also encounter it as a CNC collision model from Autodesk PowerMill or a scanning probe microscopy image from Bruker hardware. The biggest disadvantage of the .CSM format is its fragmented, proprietary nature. Steam cache files are heavily encrypted chunks of binary data that cannot be opened by standard archive tools. They consume massive amounts of disk space and are useless if the download corrupts. Garmin .CSM map files are locked to the Garmin hardware ecosystem, requiring specialized, often outdated software like Garmin MapSource to read. These files are not natively supported by web browsers, standard GIS applications, or mobile map viewers. To make this data usable, conversion is necessary depending on the file's origin. For web use and cross-platform mapping, Garmin .CSM maps should be converted to GPX or KML formats, which are universally readable by Google Earth and open-source GIS tools. For MySQL table data, standard CSV extraction is the practical target. Steam cache files cannot be converted to executable games manually; they must be managed by the Steam client. Drop your file here to analyze and convert it securely right in your browser, bypassing proprietary software locks.
Use Convert.Guru to open and convert your CSM file.
If you want to convert CSM file to DAE, MAX, BLEND, MA, MB, C4D or WRL, you can use Steam or similar software from the "Steam Depot Cache Data" category. In the File menu, look for Save As… or Export….
To convert DWG, DAE, X3D, IGES, WRL, JT, SKP, 3DS, 3DM, OBJ, STEP or FBX files to CSM, try Steam or another comparable tool in the "Steam Depot Cache Data" category.
The CSM 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 CSM converter.