JPEG and JPG are identical file formats. No technical difference between a .jpg file and a .jpeg image — both formats employ exactly the same JPEG compression algorithm and store image data in the same way.
The difference is only in the suffix, as it is a legacy issue from the early days of 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 could only be no more than 3 characters.
Which forced the four-character .jpeg extension to be reduced to .jpg for PC users. Apple and Unix platforms, which never had the character limit, used the full .jpeg file extension from the start.
While both file types work identically in nearly all today's programs, there are specific scenarios in which a platform requires the .jpeg extension. When this check here happens, renaming the file from .jpg to .jpeg is all that is needed.
No image data conversion is necessary — just updating the file extension resolves the problem in most cases.
Try alljpgconverters.com offering a completely free online JPG to JPEG converter without software needed.