Many people have wondered whether JPEG and JPG are different formats, this is very common. This is one of the most common questions in digital imaging, and the answer is clear: JPEG and JPG are the same file type.
The sole difference is the extension — a three-letter relic of legacy Windows OS which could not support four-character extensions. Regardless, there are occasionally cases where it helps to convert files from .jpeg to .jpg.
JPEG stands for more info Joint Photographic Experts Group, the committee responsible for the standard in 1992. Early versions of Windows enforced extensions to be no longer than 3 characters, hence why the format is known as JPG.
Currently, both extensions are accepted by every platform, web browser and application. No matter if a file is stored as image.jpg or image.jpeg, it opens identically.
Even though they are the same format, a few platforms require .jpg files and can reject .jpeg files because of the file extension. In these cases, changing the file extension from .jpeg to .jpg is sufficient.
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