About 1st File Renamer: The extremely easy-to-use File Renamer allows you to rename many files and folders at once. In addition, you can rename MP3 files based on ID3v1 and ID3v2 tags. The renaming features apply to sequential numbers, letters, dates, file filters, and you can find or replace part of the filename. You can delete characters, put letters in uppercase or lowercase, add or remove file extensions, and place separators in multiple locations. [more]