It seems that obj to dxf conversion should be doable in plenty of 3D modeling tools and is probably used for reasons to export a 2D view or slice from a 3D model so it can be used in a 2D CAD editor. Some software known to be capable of this conversion are listed below.
Convert 3D object graphics to AutoCAD DXF Drawing Exchange Format.
We found 19 software records in the database related to .obj to .dxf file format conversion.
Microsoft Windows software - convert obj to dxf on Windows
A 2D and 3D CAD construction software
Convert from obj file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned obj to dxf. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
A CAD 3D geometry translation software
An FBX convertor utility
A professional manufacturing data preparation software
A widely-used 3D animation application from Autodesk
A converter for 3D formats
A graphics design tool for making 3D landscaping and animations
A command line converter for 3D format
Apple macOS / Mac OS X software - convert obj to dxf on OS X
3D modeling and animation package for Mac.
A Mac version of the popular 3D visualisation software
Multiplatform software - convert obj to dxf on any platform
An open source multiplatform 3D CAD/MCAD/CAx/CAE/PLM modeler
An open source system for 3D triangular meshes
3D CAD/CAM tool for product development