To download a SoundCloud playlist to your computer you will first need the URL of the SoundCloud playlist. Navigate to SoundCloud.com and find your playlist and copy the URL. If your playlist is private make sure to copy its secret share link. Then you can navigate to downloadsound.cloud/playlist, enter the URL in the input bar, and click 'Download'. The SoundCloud playlist will now download to your computer/iPhone/Android as a collection of MP3 files.
These are the steps on how to download SoundCloud playlists to a single zip file on your computer, iPhone, or Android device.
You may also view the tracks of the playlist and remove any unwanted songs before downloading the playlist with the track list viewer, located directly below the download button.