This is a picture of a piece of paper whose top right hand corner is folded inwards on top of the paper. In the center are the letters "JPG" in large writing. It seems to be an icon for a picture file.
This page contains the JPG vector icon, as well as variations of this icon in different visual styles, and related icons. All icons are in the flat vector style, however, differ by the line thickness, fill, and corner radius.