Batch rename files and folders even using regular expressions, with Flexible Renamer
Flexible Renamer is a free, portable and powerful program able to rename files and folders in ways you may not find in similar utilities. Mass renaming is one of the most common tasks, which is the reason of so many relevant utilities that are available.
The program’s interface is simple, but hiding a lot of options that appear the moment you start pressing those few buttons. When you select an option appears instantly a preview with the file names changed accordingly. Recursive processing of sub-folders is also possible.
You can replace anything in the names, translate, number, change extensions, use (a lot of) presets to make changes even without you having to configure anything, etc.
Flexible Renamer is one of the best renaming utilities, it is special, it works great, and it provides a lot of options.