If you have ever downloaded an picture from the online and discovered it saved with a .jfif file extension instead of the standard .jpg, this happens often. JFIF — meaning JPEG File Interchange Format — is a specification that defines the way JPEG images is saved.
In practical terms, a JFIF photo is a JPEG file. The .jfif extension occurs mainly while saving photos from certain browsers, mainly if the image was served lacking a specific MIME type.
The .jfif extension started showing to regular users as some web browsers — mainly legacy versions of certain browsers — save JPEG photos with the technically accurate .jfif extension when websites does not specify the download name.
The fix is simple: simply rename the extension from .jfif to .jpg, or run it through a online converter to generate a properly labelled JPG image. In each case, the image data does not change.
The quickest fix is a file extension change. On Windows, enable file extension display in File Explorer, click the .jfif image, select Rename and change the extension to .jpg.
Try alljpgconverters.com offering a totally free web-based JFIF to JPG solution requiring no software website required.