6 Best Free OBJ to FBX Converter Software for Windows
GitHub - libgdx/fbx-conv: Command line utility using the FBX SDK to convert FBX/Collada/Obj files to a custom text/binary format for static, keyframed and skinned meshes.
Integrating Unity with 3D modeling software | FBX Exporter | 2.0.3-preview.3
Download free FbxConverter for macOS
Autodesk FBX Converter Help: Macintosh installation