JPG and JPEG are the same file formats. There is no distinction between a .jpg file and a .jpeg photo — both formats employ the identical JPEG compression algorithm and save image data in the exact same format.
The difference is only in the file extension, being a relic from early computer history. JPEG was developed in 1992 by the Joint Photographic Experts Group. The Windows operating system introduced Windows in the early era, the system enforced a limitation: file extensions had to be three characters long.
Causing the 4-character .jpeg suffix to be reduced to .jpg for Windows users. Apple and Unix platforms, not having the three-character restriction, used the complete .jpeg file extension from the outset.
Even though both file types work identically in virtually all current applications, some cases in which a system might need the .jpeg file type. For these situations, convert jpg to jpeg converting from .jpg to .jpeg is enough.
No image file conversion is necessary — only changing the extension fixes the problem in most cases.
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