These two formats are identical image formats. There is absolutely no technical difference between a .jpg image and a .jpeg file — both formats employ exactly the same JPEG compression standard and encode image data in the identical manner.
The sole distinction is purely in the file extension, being a relic from early computing. The JPEG format was created in 1992 by the Joint Photographic Experts Group. The Windows operating system released early versions of Windows, more info the system had a limitation: file extensions could only be three characters long.
This forced the four-character .jpeg extension to be reduced to .jpg for Windows users. Mac and Unix systems, which never had the extension limitation, continued using the complete .jpeg extension from the beginning.
While both file types perform equally in almost every current applications, there are specific situations when a system might need the .jpeg file type. When this happens, renaming the file from .jpg to .jpeg is all that is needed.
No image data conversion is required — only changing the extension fixes the issue almost always.
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