JPEG and JPG are identical file formats. There is no distinction between a .jpg file and a .jpeg image — both use the identical JPEG encoding method and store photos in the exact same format.
The difference is purely in the suffix, as it is a relic from early computing. The JPEG format was developed in 1992 by the Joint Photographic Experts Group. When Microsoft launched early versions of Windows, the system enforced a constraint: extensions had to be three characters long.
This forced the four-character .jpeg extension to be reduced to .jpg for Windows users. Mac and Unix systems, without this three-character restriction, could use the full .jpeg extension from the outset.
Although both extensions work identically in nearly all today's programs, certain cases where a platform may specifically require the .jpeg file type. For these situations, renaming the file from .jpg to .jpeg is sufficient.
No image file conversion is needed — simply updating the file extension resolves the problem in most more info cases.
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