Convert WPF to MP4

We are not aware of any existing way to convert WPF files directly to MPEG-4 Videos (.wpf to .mp4 conversion).

Perhaps this is just a typo, and you are actually searching for ways to convert Wondershare Filmora Project Files to MPEG-4 Videos. In that case, please refer to the WFP to MP4 conversion entry.

In a word, direct wpf to mp4 conversion is not possible.
So don't expect any so-called wpf to mp4 converter or wpf to mp4 free online conversion tool available.