JPEG and JPG are exactly the same image formats. There is no technical difference between a .jpg file and a .jpeg file — they both use exactly the same JPEG compression algorithm and store image data in the same way.
The difference is only in the suffix, as it is a legacy issue from the early days of computing. JPEG was created in 1992 by the Joint Photographic Experts Group. Early Windows introduced early versions of Windows, the system imposed 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. get more info Apple and Unix platforms, which never had the character limit, could use the longer .jpeg file extension from the beginning.
Even though both file types work identically in nearly all current applications, there are specific scenarios in which a platform might need the .jpeg extension. When this happens, renaming the file from .jpg to .jpeg is all that is needed.
No real conversion of image data is necessary — simply updating the file extension resolves the issue almost always.
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