File Extension Changer is an application with a pretty self-explanatory title - it can change the format of any file.

The difference between this program and the traditional method of changing file extensions is that File Extension Changer supports batch conversion.

So, you can save a lot of time when it comes to the extension-modifying process.

The user interface of the tool is based on a small window in which you can import a file or folder by using the file browser (the "drag and drop" method is not supported, at least not on Windows 7).

You can select the old extension and new one you want to replace it with, in order to create a list. For example, you can set File Extension Changer to change RAR to ZIP, MP3 to WAV and AVI to MPG, a task which focuses on all files and folders you have added to the list.

In addition, you can change the extensions not specified in the list to a particular format, as well as create a log file, backup file (UNDO) and BAT file (REDO) of the rename process.

Furthermore, you can import and export a list (in the File Extension Changer format), clear the current list, add more files, and others.

The program takes up a moderate amount of system resources and includes a "ReadMe" file. Moreover, File Extension Changer integrates in the context menu of files and directories.

No errors have popped up during our tests. Besides the fact that the interface needs to step up its game, we strongly recommend File Extension Changer to all users.