If you have ever saved an photo from the internet and found it downloaded with a .jfif extension instead of the standard .jpg, this happens often. JFIF — meaning JPEG File Interchange Format — is a format which defines the way JPEG images is saved.
In practical terms, a JFIF file is a JPEG photo. The .jfif file type shows up mainly when saving images from specific browsers, mainly if the image is delivered without a proper MIME type.
This file extension appeared to everyday users as some web browsers — particularly older versions of certain browsers — store JPEG images with the proper .jfif extension when the server omits the file name.
The fix is simple: just rename the file extension from .jfif to .jpg, or run it through a conversion tool to produce a standard JPG image. In both cases, the picture quality does not change.
The quickest fix is a simple rename. On Windows, turn on file extension get more info visibility in File Explorer, click the .jfif file, choose Rename and change the file extension to .jpg.
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