However, emerging cloud-based 3D platforms like , Sketchfab (now Epic Games), and Verge3D allow you to upload a high-version .MAX and export low-version .FBX or .GLTF seamlessly. These are not "MAX to older MAX" but they are the closest legal workaround.
file and select a target version (e.g., converting a 2023 file down to 2014). : Offers a MAX to FBX Convert 3ds Max File To Older Version Online
: Sites like Convert3D and 3dEncoder allow you to convert .max files into neutral formats like FBX, OBJ, or STL. You can then import these into your older version of 3ds Max. However, emerging cloud-based 3D platforms like , Sketchfab
The most reliable way to down-save a file is within the 3ds Max application itself. Recent versions allow you to save back to the . : Offers a MAX to FBX : Sites
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.