JPEG and JPG are the same image formats. No technical difference between a .jpg photo and a .jpeg photo — they both apply the very same JPEG compression standard and save pictures in the same way.
The sole distinction is only in the file extension, being a legacy issue from early computing. The JPEG format was created in 1992 by the Joint Photographic Experts Group. The Windows operating system released Windows in the early era, the operating system had a restriction: file extensions were limited to be 3 characters.
Which forced the 4-character .jpeg suffix to be reduced to .jpg for Windows computers. Mac and Unix systems, which never had the three-character restriction, could use the full .jpeg file extension from website the outset.
Even though both file types perform equally in nearly all today's programs, certain cases in which a platform may specifically require the .jpeg extension. When this happens, converting from .jpg to .jpeg is enough.
No real data conversion is required — simply updating the extension fixes the issue almost always.
Use alljpgconverters.com for a totally free online JPG to JPEG tool with no download needed.