About JPEG File Interchange Format
JFIF (JPEG File Interchange Format) is a more advanced image format that contains extra information apart from the features of .JPG and .JPEG image formats. At its simplest, it can be called an enhanced / upgraded version. You can usually open a JFIF file with any program that displays JPG images. JPEG files can be saved to JFIF by default in Windows 11 and this is usually not a problem. However, sometimes different programs cannot define this format and will not open the file, giving an error even though the content contains a standard JPG.
About Joint Photographic Experts Group
JPG or JPEG is a lossy image file compression extension, which stands for Joint Photographic Eperts Group. The JPG extension is a lossy file extension that has now been accepted by many manufacturers and is seen as one of the most ideal extensions, especially for photos. JPG is capable of reducing the total file size of files up to 5% of the size. After this compression process, some tiny details of the image disappear.