These services are legitimate, but always check reviews before uploading proprietary work.
Converting a file to an older version online is a common challenge because the .max format is a proprietary, non-backward-compatible "database" of scene data. While most standard online converters turn .max into other formats like OBJ or FBX , only a few specialized services claim to down-save to older .max versions. Top Online Conversion Tools
"If you need to open a newer 3ds Max file in an older version, your only safe and functional method is to ask someone with the newer version to export it as FBX or OBJ for you. No online tool can do this directly."
If you don't strictly need a .max file and just need the geometry and textures, online converters like or Bear File Converter can help. Pros: Quick and free.
: You can use the MAX Converter on this platform to transform newer .max files into neutral formats like FBX, OBJ, or STL . Once in a neutral format, the file can be imported into any older version of 3ds Max.
Autodesk does not promote a "downgrader," but if you have a subscription to or BIM 360 , you can: