Many people have questioned whether JPEG and JPG are different file types, you are not alone. This is one of the most common topics in image conversion, and the explanation is straightforward: JPEG and JPG are identical file type.
The sole difference is the file extension — a three-letter leftover of legacy Windows versions which could not handle four-character suffixes. Even so, there are sometimes situations when you might need to rename or convert files from .jpeg to .jpg.
JPEG is short for Joint Photographic Experts Group, the organization which developed the format in 1992. Legacy versions of Windows needed file extensions to be only 3 characters, which is why the extension was shortened to JPG.
Today, .jpg and .jpeg are supported by any OS, browser and program. Regardless of whether a image is named image.jpg or image.jpeg, it will open exactly the same.
Although they are the same file type, certain legacy systems require .jpg files and can reject .jpeg files because of the extension alone. When this happens, renaming the file extension from .jpeg to .jpg is all you need.
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