JPG and JPEG are exactly the same photo formats. No distinction between a .jpg image and a .jpeg image — they both use the very same JPEG encoding method and encode photos in the identical manner.
The difference is purely in the suffix, being a legacy issue from early computing. The JPEG format was introduced in 1992 by the Joint Photographic Experts Group. Early Windows introduced early versions of Windows, the system imposed a limitation: extensions were limited to be three characters long.
Which forced the four-character .jpeg suffix to be abbreviated to .jpg for Windows users. Non-Windows systems, without this extension limitation, used the full .jpeg file extension from the beginning.
Even though both extensions perform equally in almost every today's programs, some get more info situations in which a platform might need the .jpeg extension. For these situations, changing the extension from .jpg to .jpeg is sufficient.
No actual data conversion is necessary — just updating the file extension resolves the issue usually.
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