Windows utility for bulk renaming files based on regular expressions with preview.
Type or browse to the folder you want to search. Enter a regular expression for the files you want to match such as "(?.).(?(?[^.])(?[^.]))". Enter a replace expression such as "[${extPrefix}_${extSuffix}] ${fileName}.${extension}". Confirm the changes you expect in the preview. Uncheck any changes you don't want to apply. Either click Go to do the rename or Export to save a batch file that you can edit and run later.