These two formats are identical file formats. There is absolutely no difference between a .jpg file and a .jpeg photo — both formats apply exactly the same JPEG encoding method and save image data in the exact same format.
The sole distinction is entirely in the file extension, being a historical artifact from early computing. JPEG was developed in 1992 by the Joint Photographic Experts Group. The Windows operating system introduced early versions of Windows, the OS imposed a constraint: extensions were limited to be 3 characters.
This forced the four-character .jpeg suffix to be abbreviated to .jpg for PC users. Mac and Unix systems, which never had this extension limitation, used the longer .jpeg file extension from the start.
While both file types work identically in virtually all today's programs, there check here are specific cases where a system may specifically require the .jpeg file type. For these situations, changing the extension from .jpg to .jpeg is enough.
No actual file conversion is needed — simply changing the file extension fixes the issue usually.
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