JPEG and JPG are identical file formats. No technical difference between a .jpg file and a .jpeg file — they both use exactly the same JPEG compression algorithm and store image data in the same way.
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 were limited to be three characters long.
Which forced the get more info 4-character .jpeg extension to be shortened to .jpg for Windows computers. Apple and Unix platforms, which never had the character limit, could use the longer .jpeg file extension from the beginning.
Even though both extensions work identically in nearly all current applications, there are specific cases where a service might need the .jpeg file type. For these situations, changing the extension from .jpg to .jpeg is sufficient.
No actual file conversion is required — only renaming the extension solves the problem in most cases.
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