We’ve tested many of these free YouTube converters ourselves, and as a result, found the ones that met our high standards and put together the following list. It should let you easily pull up those songs and other types of content on your iPhone or Android device so you can enjoy them while you’re on a flight, at the gym, or driving across the country. However, if that creator has given you permission to download their content, a free YouTube to MP3 converter should do the trick.
Also, unauthorized downloads are against YouTube's terms of service, and TechRadar does not condone the use of these products for any copyright-infringing purposes. Bear in mind that viewing content on YouTube on the browser or via the app helps support YouTube creators since the more views they get, the more money they can make.