These two formats are identical image formats. No difference between a .jpg image and a .jpeg photo — both use the identical JPEG encoding method and encode pictures in the same way.
The only difference is purely in the extension, being a historical artifact from the early days of computing. The JPEG format was developed in 1992 by the Joint Photographic Experts Group. Early Windows launched early versions of Windows, the operating system had a constraint: extensions were limited to be three characters long.
This forced the 4-character .jpeg suffix to be shortened to .jpg for Windows users. Non-Windows systems, without this three-character restriction, continued using the complete .jpeg extension from the outset.
Although both extensions perform equally in almost every current applications, some scenarios where a service requires the .jpeg file type. For these situations, renaming the file from .jpg to .jpeg is enough.
No actual conversion of image data is required — only changing the file extension resolves the compatibility concern usually.
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