JPEG and JPG are exactly the same file formats. There is absolutely no distinction between a .jpg photo and a .jpeg image — both formats apply the identical JPEG compression standard and save photos in the identical manner.
The only difference is purely in the file extension, as it is a relic from the early days of computing. JPEG was created in 1992 by the Joint Photographic Experts Group. Early Windows introduced Windows in the early era, the system enforced a restriction: file extensions had to be no more than 3 characters.
Causing the four-character .jpeg suffix to be reduced to .jpg for PC users. Apple and Unix platforms, which never had the character limit, could use the longer .jpeg extension from the beginning.
Even though both extensions work identically in nearly all current applications, there are specific scenarios here where a service might need the .jpeg extension. When this happens, changing the extension from .jpg to .jpeg is enough.
No real conversion of image data is needed — simply changing the file extension fixes the issue almost always.
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