Unauthorized downloads are against YouTube's terms of service, and TechRadar does not condone the use of these products for any copyright-infringing purposes. Before using one, however, make sure that you have the creator or copyright holder’s permission to download their content. Not to be confused with the best free music downloader apps, free YouTube to MP3 converters are somewhat similar to the best free YouTube downloader apps, except instead of downloading actual videos, they convert YouTube videos to MP3 and other formats.

With one of these converters however, you'll be able to easily pull up those songs (and other types of content, for that matter) on your iPhone or Android device and listen to them while you’re on a flight, at the gym or driving across the country.