The Bulk Export Import extension is an extremely effective extension that allows you to export product information and import data from products for Opencart.
It also update the products in Bulk.
It permits the admin to export and import data from products. The bulk upload extension for Opencart lets the administrator export all information simultaneously into an Excel spreadsheet.
Check Article here.
Administrators are able to export and import Products information, If you select the brand new “Check Existing Products” checkbox then you’ll notice "matching columns” in the “matching column” section as detailed in the article. After that, you should select the column that is matching. Similarly, choosing the existing product is provided in the update option and both choices are accessible from the administrator interface.