Renamer4Mac makes it easy to rename a large number of files. You just drag files or folders into its window, then adjust what you want to change. As you define your intended changes, Renamer4Mac previews in blue what each new file name will look like. When your file names appear the way you want them, you can apply the changes.

This tool is perfect for designers who find themselves with a folder of files whose names need to be adjusted. For example, adding an identifying name to photos, along with a sequential number. Or changing the names of files for a website to lower case and replacing spaces with underscores.

Renamed4Mac has plenty of options: you can remove or replace words or characters, insert text anywhere in the file name, add sequential numbers at either end of a file name, convert to UPPERCASE, lowercase or Word Caps. It’s powerful enough to process regular expressions (calculations and wildcards), and can rename files recursively through nested folders. You can also use it in the Finder as a contextual menu item — just Control-click a file or folder.

In short, Werner Freytag’s free Renamer4Mac is one of the best file-renaming solution we’ve found.

Source: This tip comes from the February 2008 issue of Design Tools Monthly. Seattle creative teams with a Creativetechs support plan receive a complimentary subscription to Design Tools Monthly in their monthly care package.