Renamer is designed to make batch file renaming and numbering pleasant, easy and fast. If you've every tried to rename a large set of files by hand and thought there must be an easier way, then Renamer is for you. Store your favorite rename tasks in presets and access them later in just a single click. For power users Renamer offers to find and replace filenames with regular expressions. Your renames can be undo so you don't have to worry about making mistakes. Preview how your files will be renamed. Great for catching errors and fine-tuning.