For macOS 10.10 and later only. This applet will examine the artwork of each selected track (or tracks in the selected playlist) and if greater than a user-set resolution (n x n pixels) will downscale the image to that resolution. Artwork already at the set resolution or smaller will not be affected. Includes options to pad image to make square, preserve extant track artworks, adjust preview proportionally and export displayed artwork to disk.
Also see Tracks Without Embedded Artwork.
Your settings are maintained between launches.
(via in-app purchase)
Perhaps Also of Interest...
downloaded 8m 30s ago
Exports and then re-imports selected tracks' artwork
downloaded 21m 59s ago
Displays files in iTunes Media folder not in iTunes track library
downloaded 38m 23s ago
Remove iTunes tracks disassociated from files
downloaded 42m 37s ago
Download selected media from a web page in Safari
downloaded 45m 13s ago
Batch merge and/or delete playlists
downloaded 1h 9m 24s ago
Batch-change the Album Rating for the albums of selected tracks