Thumbnail is a term used by graphic designers and photographers for a small image representation of a larger image, usually intended to make it easier and faster to look at or manage a group of larger images. ... The user controls which images need to be seen in full size.

What is thumbnail of a file?

THUMBNAILS extension is a hidden folder stored in the sdcard/DCIM directory on select Android devices. It contains one or more . thumbdata files that store properties about thumbnail images indexed by the Gallery app to load images quicker.

Is a thumbnail a JPG?

Most thumbnails are made of . JPG images, a common format among images on the Internet.