Free file format convertor software, Microsoft Store app, Free online file converter tool to convert MP4 to MP3, AVI, GIF, MOV WAV, WMV are covered here.

You can convert files to the MP4 format on the VLC media player, making them more accessible across your devices.

A WP3, however, is a project file and doesn't contain video. Use Photo Story to convert your WP3 file to the WMV format, then use third-party software to convert the video file to an MP4.

VideoProc Converter lets you convert videos to MP4, MOV and other universally supported formats that work seamlessly across Apple and Windows devices.