Based on our record, File-Extensions.org seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
File-extensions.org lists following files for .3 extension:. Source: about 1 year ago
Zamzar - Free conversion online of many type of documents (images, text, video, audio...
FileProInfo - It's All About Files, Software, Online Tools - 100% Free
Online Convert - Convert files like images, video, documents, audio and more to other formats with this free and fast online converter.
FileInfo.com - FileInfo is the central file extensions registry and contains a database of over 10,000 file types.
Convertio - File Conversion in the Cloud
FILExt - Open, view and convert files online