If you have ever asked if JPEG and JPG are separate file types, this is a frequent question. It is one of the most popular 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 change 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 read more needed 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 extension alone. When this happens, changing the file extension from .jpeg to .jpg is all you need.
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