4K YouTube to MP3 is an app from the creators of 4K Video Downloader that lets you download a video platform's content and convert it directly to an audio file format, such as MP3, OGG and M4A. 4K YouTube to MP3 also lets you choose the sound quality from between 128, 192, 256 and 320 kbps. If you choose 320 kbps, the audio will be downloaded in the highest quality available, which, in the free version of YouTube, is 128 kbps.
In addition to YouTube, 4K YouTube to MP3 lets you download audio from SoundCloud, Facebook, Vimeo, TikTok, Instagram or Dailymotion, among others.
To download the audio from a video, just paste the URL into the program. After that, a window will open where you can preview the video, and a download button will appear at the bottom. After you press it, the audio will be downloaded automatically according to the quality and format parameters you have selected.
The free version of 4K YouTube to MP3 lets you download 15 videos per day. If you want more, you will have to go for the paid version. With the paid version, you can download the entire contents of a playlist or all the videos offered by a specific channel. You will also be able to enjoy the audio in maximum quality.
So, if you want to download and convert YouTube videos directly to MP3, then download 4K YouTube to MP3.
4 reviews 
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good but slow to open
my 4k mp3 license was canceled like never before
Optimal