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
You can right-click the file, select "Rename," and change the extension from .jfif to .jpg . How to Convert JFIF to JPG Download images jfif
Photoshop, GIMP, and Paint can open, view, and convert JFIF files. and Paint can open
If you want to stop this from happening, you can modify your Windows registry: JFIF to JPG Converter - CloudConvert Download images jfif
Certain Windows Creators Updates and browser updates in Chrome or Edge can default to saving JPEG images as .jfif .
Use free services like FreeConvert.com or CloudConvert to upload and convert files.