These two formats are identical photo formats. There is no difference between a .jpg image and a .jpeg image — both formats apply the identical JPEG compression standard and save image data in the same way.
The 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 launched Windows in the early era, the operating system enforced a restriction: file extensions could only be no more than 3 characters.
Which forced the four-character .jpeg extension to be reduced to .jpg for PC users. Apple and Unix platforms, which never had the extension limitation, used check here the full .jpeg file extension from the start.
While both file types work identically in nearly all current applications, there are specific scenarios in which a platform requires the .jpeg extension. When this happens, renaming the file from .jpg to .jpeg is all that is needed.
No image conversion of image data is required — just renaming the extension fixes the issue almost always.
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