Conversion of 3d to 2d can represent many things, but is mostly related to attempts to convert 3D models to 2D technical designs, something which can be done using dedicated CAD/3D modeling tools. However, almost every professional CAD tool nowadays uses unique file types instead the old and somewhat generic .2d and .3d files.
Convert 3D drawing CAD file to VersaCAD 2D CAD drawing.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert 3d to 2d on Windows
A CAD designing software
Convert from 3d file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.