BrowseByExt is a portable utility that shows how many files you have by extension and how many.
BrowseByExt is essentially a system information tool for file types. By this, we mean that it will not organize, modify, nor delete.
That said, it does have a purpose. You will see a dual pane with the file types on the left and filenames to the right.
You can list all file extensions by name or number, from high to low. You can list all files by name, size, or last modified.
BrowseByExt is a niche utility that can help you see how many files you have by extension or possibly to locate large files or even files by the date that you lost it, for example. Pretty neat little app.