That depends on how you want to export them. To do a mass copy of the playlists, simply locate the My Playlists folder in your My Documents>My Music folder. Copy the entire folder and you have all the playlists. To do a mass conversion to another playlist type, you need a third-party playlist editing application.
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.