Fileize

Fileize is an application designed to rename files in batch mode by appending a suffix or prefix. It comes loaded with just a few intuitive options that can be figured out even by casual users. Before proceeding any further, you should keep in mind that it cannot remove folders.

Rename files in batch mode

It adopts a user-friendly interface made from a large window with a clear-cut structure, where you resort to the integrated file explorer to locate disk directories and select the files you want to rename, after examining their name, format, size, and date of last modification.

Specify a suffix or prefix and preview results

Adding files from different folders is only possible by appending their full paths to the existing task list, by typing or pasting them. You can specify a prefix, suffix or both, as well as check out the changed file names before proceeding with the renaming job.
Furthermore, you can refresh information, select or deselect all files by clicking a couple of buttons, invert the selection, or select none. Keyboard shortcuts and command lines are supported. Apart from the fact that a help manual is available, there are no other notable settings provide by this app.

Evaluation and conclusion

It left a small footprint on system performance in our tests, thanks to the fact that it needed a low amount of CPU and memory to work properly. No error dialogs popped up and it didn't hang or crash.
However, Fileize features only two renaming methods and lets you preview changed files. These functions can be found in similar software tools which are free to use. On top of that, it doesn't offer a simple method for adding files from different folders to the task list. Nevertheless, you can test the utility for yourself.