Many people have questioned whether JPEG and JPG are different formats, you are not alone. This is one of the most common questions in image conversion, and the explanation 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 suffixes. Regardless, there are sometimes situations when it helps to change files from .jpeg to .jpg.
JPEG is short for Joint Photographic Experts Group, check here the group which developed the format in 1992. Legacy versions of Windows enforced file extensions to be only 3 characters, which is why the extension was shortened to JPG.
Today, .jpg and .jpeg are supported by every platform, browser and program. Regardless of whether a file is stored as image.jpg or image.jpeg, it will open exactly the same.
Although they are the same format, a few systems require .jpg files and can reject .jpeg files because of the file extension. When this happens, changing the file extension from .jpeg to .jpg is sufficient.
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