Convert EPRT to DWG

eDrawings files, such as the .eprt files (parts) are not meant to be converted or further edited, so the options for eprt to dwg conversion  are limited. These files are generated as a publishing and sharing format, similar in purpose to PDF format. As such, there is no program that could converted to something else, you would need the original CAD file (most likely .sldprt) if you are trying to convert it something else like DWG.

Simply put, it is impossible to convert EPRT to DWG directly.
Thus, there is no so-called eprt to dwg converter or a free online .eprt to .dwg converter to be found.