JPG and JPEG are identical photo formats. There is no distinction between a .jpg file and a .jpeg image — both apply the identical JPEG compression algorithm and save pictures in the same way.
The only difference is only in the file extension, being a relic 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 OS imposed a constraint: extensions had to be three characters long.
This forced the 4-character .jpeg extension to be abbreviated to .jpg for Windows computers. Apple and Unix platforms, not having this three-character restriction, could use the full .jpeg extension from the outset.
While both extensions work identically in almost every modern software, some situations where a platform requires the .jpeg file type. For these situations, changing the extension from .jpg to .jpeg is all that is needed.
No image file conversion is needed — simply renaming the extension solves the issue almost always.
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