Open a playlist in Spotify's web player UI. Do the infinite scroll trigger until the entire playlist is visible. Run this in the DevTools console to get a CSV-friendly version of the playlist copied to your clipboard. Paste into a text editor. Save as CSV.

spotify-to-csv.js

copy(Array.from(document.querySelectorAll('.tracklist-container:not(.PlaylistRecommendedTracks__list) .tracklist-row')).map(row => {
	const artists = Array.from(row.querySelectorAll('.tracklist-row__artist-name-link')).map(artist => artist.innerHTML).join(', ');
	const title = (row.querySelector('.tracklist-name') !== null ? row.querySelector('.tracklist-name').innerHTML : row.querySelector('.TrackListRow__artists').innerHTML);
	const album = (row.querySelector('.tracklist-row__album-name-link') !== null ? row.querySelector('.tracklist-row__album-name-link').innerHTML : row.querySelector('.TrackListRow__album').innerHTML);
	return `"${title}","${artists}","${album}"`;
}).join("\n"));