FileProInfo.com is the file information database of over 15,000+ file types, software, free online apps/tools, so tools, guest blogs, videos, and images.
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ReConvert - Page builder to design thank you page that cross sell & upsell
Convertio - File Conversion in the Cloud
In Cart Upsell - Boost revenue and increase average order size with the #1 upsell app for Shopify stores.
File-Extensions.org - Large computer file extension library with detailed explanation of each file type with links to download free or associated software programs.
Shopify Upsell Bundles App - Shopify app to Create Bundles, Packages and Sets with discounts by the most simple and efficient...
FileInfo.com - FileInfo is the central file extensions registry and contains a database of over 10,000 file types.