JPG and JPEG are identical photo formats. There is no difference between a .jpg photo and a .jpeg file — both formats employ exactly the same JPEG encoding method and encode image data in the identical manner.
The sole distinction is purely in the extension, being a relic from early computing. The JPEG format was created in 1992 by the Joint Photographic Experts Group. The Windows operating system released Windows in the early era, the operating system had a restriction: file extensions were limited to be no more than 3 characters.
Which forced the 4-character .jpeg suffix to be reduced to .jpg for Windows computers. Mac and Unix systems, which never had this three-character restriction, could use the full .jpeg extension from here the beginning.
While both extensions work identically in nearly all today's programs, certain scenarios when a system might need the .jpeg extension. In these cases, changing the extension from .jpg to .jpeg is all that is needed.
No image file conversion is needed — just renaming the extension resolves the problem in most cases.
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