Windows Photos, macOS Preview, and web browsers (Chrome/Edge) can open JFIF files directly.
Certain Windows Creators Updates and browser updates in Chrome or Edge can default to saving JPEG images as .jfif . Download images jfif
A .jfif file is essentially a renamed .jpg. It contains the exact same data and compression as a standard JPEG, but the extension looks different. How to Open JFIF Files and Paint can open
You can right-click the file, select "Rename," and change the extension from .jfif to .jpg . How to Convert JFIF to JPG and convert JFIF files.
Photoshop, GIMP, and Paint can open, view, and convert JFIF files.