A (.jfif) file is a JPEG File Interchange Format standard, which is fundamentally a variation of a JPG/JPEG image. If you are downloading images and finding them saved as .jfif instead of .jpg , it is likely due to system settings in Windows 10/11 or your web browser. Why Images Download as .jfif
Windows Photos, macOS Preview, and web browsers (Chrome/Edge) can open JFIF files directly. Download images jfif
If you want to stop this from happening, you can modify your Windows registry: JFIF to JPG Converter - CloudConvert Download images jfif