JPG and JPEG are the same photo formats. No distinction between a .jpg photo and a .jpeg photo — both formats apply the identical JPEG compression standard and save photos in the identical manner.
The only difference is purely in the file extension, which 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 imposed a restriction: file extensions had to be no more than 3 characters.
Causing the four-character .jpeg suffix to be abbreviated to .jpg for Windows users. Mac and Unix read more systems, not having the three-character restriction, continued using the complete .jpeg extension from the outset.
Although both extensions perform equally in almost every modern software, certain cases where a service may specifically require the .jpeg file type. For these situations, changing the extension from .jpg to .jpeg is sufficient.
No actual file conversion is required — only changing the extension solves the compatibility concern usually.
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