JPEG files end in .JPG. A JPEG and JPG are the same thing, but file formats typically only have three letters so the E is dropped in the file extension. If a file ends in .JPG, it’s a JPEG.

Here’s what you need to know about the four main image formats – JPEG, PNG, GIF, and raw. JPEG stands for Joint Photographic Experts Group, which is the name of the organisation that developed ...