These two formats are identical image formats. There is no technical difference between a .jpg file and a .jpeg file — they both use exactly the same JPEG compression algorithm and store pictures in the exact same format.
The sole distinction is only in the suffix, being a legacy issue from early computer history. The JPEG format was developed in 1992 by the Joint Photographic Experts Group. When Microsoft released early versions of Windows, the OS had a constraint: extensions had to be 3 characters.
Causing the 4-character .jpeg suffix to be shortened to .jpg for Windows users. Non-Windows systems, not having this three-character restriction, continued using the complete .jpeg extension from the outset.
Although both extensions function the same in almost every current applications, certain more info situations in which a service might need the .jpeg file type. In these cases, converting from .jpg to .jpeg is all that is needed.
No image conversion of image data is needed — only renaming the file extension fixes the problem usually.
Try alljpgconverters.com offering a totally free online JPG to JPEG solution without download required.