JPEG and JPG are exactly the same 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 system imposed a limitation: extensions had to be 3 characters.
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 start.
While both file types function the same in virtually all today's programs, some situations in which a platform requires the .jpeg extension. When this 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 almost website always.
Visit alljpgconverters.com for a totally free browser-based JPG to JPEG solution with no account necessary.