mp4.to : video file converter
pdf.to : document file converter
word.to : document file converter
jpeg.to : image file converter
mp3.to : audio file converter
Zamzar
All Docs File Converter : open source, pandoc based
Online Convert : many types of files
Fileconverter : Browser WASM based, local, file converter
File Converter : Windows app
Pandoc
Handbrake : Video converter
Pazeera