If you want to convert MP4 to MP3 free, Freemake Video Converter will help you encode files quickly and easily. Even a newbie can do it, for free.
Get software and follow 3 steps to convert MP4 to MP3:
Start Freemake Video Converter. Click "+Video" button to add MP4 videos you want to convert to MP3 or "Paste URL" button to convert MP4 video from YouTube.
Click "to MP3" at the bottom of the software. Choose a ready preset or create a custom one. Select "Export to iTunes" if you want to transfer MP3s to your iPod, iPad or iPhone.
Click "Convert" to start conversion process.
Alternatively, you can download MP3 free from YouTube.