Since .max is a proprietary, closed-source format, there are very few "one-click" websites that can natively convert a 2024 .max file to a 2021 .max file. However, you can use the following online and cloud-based strategies to get the job done: 1. Using Cloud Rendering Services
You will lose the modifier stack, procedural lights, and complex rigging. You will essentially receive a "collapsed" mesh. 3. Using Autodesk Viewer for Intermediate Inspection Convert 3ds Max File To Older Version Online
You cannot directly convert a native .MAX file to an older native .MAX file online for free with full fidelity, but you can convert it to FBX or OBJ using AnyConv, Convertio, or Zamzar, then import it into your older 3ds Max — which works for geometry and textures. You will essentially receive a "collapsed" mesh
Converting 3ds Max files online is a straightforward process. Here's a step-by-step guide: Converting 3ds Max files online is a straightforward process