JPG and JPEG are identical file formats. No distinction between a .jpg photo and a .jpeg photo — both employ the very same JPEG encoding method and save photos in the identical manner.
The only difference is entirely in the file extension, which is a historical artifact from early computing. JPEG was introduced 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 systems, not having website this three-character restriction, continued using the complete .jpeg extension from the outset.
Although both file types function the same in virtually all today's programs, some situations when a platform requires the .jpeg extension. In these cases, renaming the file from .jpg to .jpeg is all that is needed.
No image conversion of image data is necessary — just updating the file extension resolves the issue almost always.
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