Batch File Extension Renamer

If you want to change a file's extension, by renaming the file, you will end up changing only the name, without affecting the extension. It should be more than obvious waht you can do with Batch File Extension Renamer. This simple application enables you to change file extensions. It is capable of processing any number of files in a single run, without any effort from your part.

The application is available for Windows, Mac OS X and Linux platforms and it is free. The best part is that you don't have to install it. If you opt for the Windows edition, you will find two executables, in 1.47 MB archive, for 32 and 64-bit operating systems.

All you have to do is select a source folder, as well as a destination, and specify the input and output extensions. Before you start renaming, you can swap the input extension with the output, if you want to. You can also tick an option, on the same interface, to replace the original files, instead of saving them in a different folder.

It takes only a few seconds to change countless extensions. When the process is complete, the software will display the original extension, as well as the new one, for each file, in the lower region of the interface. Besides changing extensions, you can also clean up duplicates. If an extension appears more than once in a file's name, you can bring up a duplicate fixer, on a separate window. You just need to select the parent folder, click a button and the application will remove all duplicate extensions immediately.