Many people have asked if JPEG and JPG are separate file types, this is very common. It is one of the most popular questions in photo editing, and the explanation is simple: JPEG and JPG are identical file type.
The difference is the file extension — a three-letter remnant of old Windows OS that could not handle four-character file extensions. Even so, there are occasionally scenarios when it helps to rename or convert files from .jpeg to .jpg.
JPEG stands for Joint Photographic Experts Group, the organization which developed the standard in 1992. Older versions of Windows needed extensions to be maximum 3 characters, hence why the format was shortened to JPG.
Currently, both extensions are recognized by every operating system, browser and application. No matter if a image is stored as image.jpg or image.jpeg, it displays exactly the same.
Even though they are the identical format, certain legacy platforms specifically expect .jpg files and can reject .jpeg extensions due to the file extension. For these situations, changing the extension from .jpeg to .jpg is all you need.
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