Input formats supported are OGG, WAV, MP3 and WMA. You'll have your audio files converted in a snap.
MAybe the most important feautre is the fact that it allows you to do batch conversion. Add as many files as you need to convert to mp3 and once you'll have all of them, click the convert button to convert all of them at once.
It also supports drag&drop, what makes it easy to use when you find the track while browsing using file explorer.
Free MP3 Converter is an interesting choice for all those who want to convert audio files to mp3 and don't want to spend any money.