Convert EMBP to MOBI

embp to mobi conversion seems unlikely, because of the type of both file types, i.e. encrypted auxiliary file (.embp) and actualy ebook (.mobi). Everything points to the fact that .embp files are not ebooks, just files that contain list of changes made by the user whilst viewing the ebook, like annotations, corrections, marks etc as well as some metadata.

Simply put, it is impossible to convert EMBP to MOBI directly.
Thus, there is no so-called embp to mobi converter or a free online .embp to .mobi converter to be found.