.JFIF File Extension
File TypeJPEG File Interchange Format
What is a JFIF file?
Bitmap graphic that uses JPEG compression; a variation of the common JPEG format that is designed to use a minimal amount of data and allow JPEG bitstreams to be exchanged between multiple platforms and applications.
You can open JFIF files with a variety of programs in Windows and macOS, including the Photos and Preview apps bundled with the operating systems. You can also open JFIF files with IrfanView but the program needs to change the .jfif extension to .jpg before opening it.
NOTE: The JFIF format is not used often and has been superseded by other improvements to the JPEG format.