If you have ever stored an picture from the web and noticed it downloaded with a .jfif suffix instead of the usual .jpg, you are not alone. JFIF — short for JPEG File Interchange Format — is a format that defines how JPEG photos is encoded.
In practical terms, a JFIF image is a JPEG photo. The .jfif extension appears mainly while saving files from certain browsers, especially if the image comes with no a specific content-type header.
This file extension started showing to most people as some browsers — particularly older versions of Internet Explorer — store JPEG photos with the correct .jfif file extension if the server fails to specify the download name.
Fixing this is straightforward: just rename the extension from .jfif to .jpg, or process it with a conversion more info tool to create a correctly named JPG image. Either way, the picture quality does not change.
The simplest approach is a direct file rename. On Windows, enable file extension visibility in File Explorer, click the .jfif image, choose Rename and change the extension to .jpg.
Use alljpgconverters.com offering a completely free browser-based JFIF to JPG solution without account required.