OS X 10.10 or later. iTunes only allows one playlist to be selected at a time. This applet can perform common useful tasks on a multiple selection of playlists: rename (add text, remove text, search and replace text), duplicate, delete, export, merge.
Tools in the Rename tab operate on the selected playlists' names
(via in-app purchase)
Perhaps Also of Interest...
downloaded 28s ago
Apply selected CD's CD Text to its disc and track tags
downloaded 6m 8s ago
Correct song titles listed as "Artist - Song Name"
downloaded 42m 51s ago
Gather audio tracks whose files contain no artwork metadata
downloaded 44m 26s ago
Restore each selected track's artwork from an image file stored in its Album folder
downloaded 45m 53s ago
Export album artwork as folder.jpg to Album folder
downloaded 46m 8s ago
Export artwork of selected tracks to parent or specified folder