Convert Autocad DWG to OBJ, FBX or similar

Question

How can i convert an autocad dwg or dxf file to a more 'common' format like OBJ, FBX, 3DS, etc. ?

I have tried a free software called abviewer 10 but the exported file is always empty.

Solution 1

At the end, I used a program called Rhino3d. You can check it here.
https://www.rhino3d.com/download

Solution 2

You can use the AutoCAD I/O web service to batch convert files. See documentation at http://developer.autodesk.com

In summary you can upload a .dwg along with script contains a -FBXEXPORT command, which will make the export. After that you can download the exported file.