Free Download Playlist from YouTube or YouTube Music | NoteBurner
YouTube Playlist Downloader – free for all users
How to Convert YouTube Playlist to MP3 at Once (Incl. Batch & Free)
GitHub - shaked6540/YoutubePlaylistDownloader: A tool to download whole playlists, channels or single videos from youtube and also optionally convert them to almost any format you would like
The Easeiest Ways to Download Playlist from YouTube as MP3 or WAV