Switching to WhizzyCommerce
Changing e-commerce platform should not mean guessing what comes with you, so here it is plainly. Magento 2 shops have a one-file importer with a dry run first, and the move done for you, free, for the first 100. From anywhere else there is no spreadsheet importer yet: products go in by hand, or the shop's assistant adds them one preview at a time, pictures from a web address included.