4k YouTube to MP3 - Version 1.5 4k YouTube to MP3 allows to download audio content from YouTube in the high quality and to save it on your computer. This program is completely free, open source and cross-platform. It can be used on various platforms: Windows, Mac OS X and Linux. We paid great attention to simplicity and usability during development. Downloading is simple and pleasant, just copy link from browser and click "Paste Url". Try it!