Often you might find you have a folder containing hundreds of files, and you want to rename them all. Obviously, you don’t want to do this manually, it would take forever. You could download a shareware application to do the job, but that’ll cost you. Luckily you can use Automator to make the process more efficient. 
Mac OSX Tips has a quick tutorial to show you how to batch rename files using an Automator workflow, and it won’t cost you a dime.
