These two formats are exactly the same image formats. There is no technical difference between a .jpg file and a .jpeg file — both employ the very same JPEG encoding method and encode photos in the identical manner.
The only difference is entirely in the extension, which is a historical artifact from early computing. JPEG was created in 1992 by the Joint Photographic Experts Group. Early Windows introduced Windows in the early era, the system enforced 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 this three-character restriction, continued using the complete .jpeg extension from the outset.
Although both extensions perform equally in almost every modern software, some situations when a system 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 here the issue almost always.
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