REN is a file renamer, to rename files. Various tests have proved its effectiveness in easy and quick renaming. REN helps home users and technicians who deal with a mixture of documents, sequential versions of text files, music files and huge number of other file extensions. Tracing several files of same name and renaming numerous files at an instance would be dreadful. It is a very tedious task and consumes lot of time. Especially when you feel that you are messed up with abundant files of similar names. REN rename files in simple functions and gives a better solution in arranging and renaming files in the manner you expect