cPanel includes an application for creating smaller versions of images, called “thumbnails.” This can be useful in creating a photo page where smaller previews of your images can be viewed before the larger original image is accessed, saving bandwidth.
The application is known as the Thumbnailer and can be accessed by clicking Image Manager, then clicking the Thumbnailer link. From here, an entire directory must be selected.
Note: The Thumbnailer application will not resize individual images.