obj to sh3f conversion pretty much describes the import of 3D objects (.obj) to Sweet Home 3D software and adding the asset the 3D model library (represented as .sh3f file). This is not really file conversion, more of standard workflow done with the software.
If you somehow struggle with the import of OBJ format, or have some other issue. It would be best to contact their support or perhaps to reach out to the online community. Perhaps you can even find some tutorials and guides about Sweet Home 3D libraries and how to work with them on YouTube.
Updated: September 18, 2023