JPG and JPEG are the same file formats. There is absolutely no technical difference between a .jpg image and a .jpeg file — both formats use the identical JPEG compression standard and encode photos in the same way.
The difference is entirely in the suffix, being a relic from the early days of computing. JPEG was developed in 1992 by the Joint Photographic Experts Group. Early Windows released Windows in the early era, the OS enforced a limitation: file extensions were limited to be no more than 3 characters.
Causing the 4-character .jpeg suffix to be reduced website to .jpg for Windows users. Apple and Unix platforms, without the extension limitation, continued using the longer .jpeg file extension from the outset.
While both extensions work identically in virtually all modern software, there are specific situations when a service requires the .jpeg file type. For these situations, renaming the file from .jpg to .jpeg is sufficient.
No actual data conversion is required — simply updating the file extension solves the compatibility concern almost always.
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