You can find many completely different .pdb files, but it is likely that at least some of them can be saved as JPG images, typically the ones that are either documents or graphics files already. It is not guaranteed for every .pdb file, but it is safe to say that images can generally be saved as JPEGs, which is what pdb to jpg conversion is.
Open PDB file Open JPG fileAn online graphics converter and resizer
A 3D CAD translation software