The Spotify Playlist Cover size (640×640px)
Spotify playlist covers are square, and 640x640 pixels is a solid size for a custom cover that stays sharp across the app. Spotify recommends square cover art and displays it as a 1:1 tile everywhere, in your library grid, at the top of the playlist, and in search, so a properly sized square image keeps your playlist looking polished rather than defaulting to the auto-generated mosaic of track thumbnails.
A custom cover is one of the easiest ways to make a playlist feel like a real, curated collection. Because the cover appears small in the library grid and even smaller in Now Playing on some views, bold, simple art with strong contrast reads far better than a busy image with fine detail or small text that disappears at tile size. Spotify overlays the playlist title in the app, so the artwork itself does not need to spell everything out.
Spotify compresses uploaded cover art, so starting from a clean 640x640 gives the encoder good pixels to work from and avoids the muddy look of an undersized image being stretched. Keep your focal point centered so it survives every place Spotify frames the square. Everything here resizes 100% in your browser with no upload and for free, so your cover art stays private on your device. Spotify occasionally updates its cover recommendations and how art is displayed, so verify the current spec before uploading a set of playlist covers.