JPEG and JPG are the same photo formats. No distinction between a .jpg photo and a .jpeg image — both formats apply the identical JPEG compression standard and save image data in the same way.
The difference is purely in the suffix, as it is a legacy issue from early computer history. The JPEG format was developed in 1992 by the Joint Photographic Experts Group. When Microsoft released early versions of Windows, the OS had a limitation: extensions were limited to be three characters long.
This forced the 4-character .jpeg extension to be shortened to .jpg for Windows computers. Apple get more info and Unix platforms, which never had the character limit, could use the longer .jpeg file extension from the beginning.
Even though both extensions work identically in nearly all modern software, certain cases where a system may specifically require the .jpeg file type. In these cases, converting from .jpg to .jpeg is sufficient.
No image data conversion is required — just updating the file extension resolves the problem almost always.
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