If you have ever saved an photo from the web and discovered it saved with a .jfif file extension rather than the usual .jpg, this is common. JFIF — which stands for JPEG File Interchange Format — is a standard that defines how JPEG photos is encoded.
Essentially, a JFIF image is a JPEG file. The .jfif extension appears mostly while saving photos from some web browsers, particularly when the image comes with no a defined content-type header.
The .jfif extension started showing to most people since some browsers — mainly legacy versions of Internet Explorer — save JPEG files with the correct .jfif extension when websites fails to specify the filename.
The fix is simple: just rename the file extension from .jfif to .jpg, or process it with a online converter to produce a standard JPG image. In each case, the picture quality does not change.
The quickest fix is a simple rename. For Windows users, turn on file extension visibility in File Explorer, click the .jfif file, choose Rename and change the file extension to .jpg.
Use alljpgconverters.com providing 100 percent free web-based website JFIF to JPG tool requiring no software necessary.