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 the way JPEG photos is encoded.
Essentially, a JFIF image is a JPEG file. The .jfif extension appears mostly after saving photos from some web browsers, particularly when the image comes lacking a defined content-type header.
JFIF files started showing to regular users because some older browsers — mainly legacy versions of Microsoft Edge — download JPEG photos with the technically accurate .jfif file extension if the server does not specify the download name.
Fixing this is straightforward: simply rename the file extension from .jfif to .jpg, or process it with a converter tool to generate a correctly named JPG file. In each case, the image data stays the same.
The easiest method is a direct file rename. For Windows users, enable file extension display in File Explorer, get more info right-click the .jfif image, select Rename and modify the extension to .jpg.
Use alljpgconverters.com providing completely free web-based JFIF to JPG converter without software needed.