Change File Extension To easily convert JPEG (or JPG) to PNG, PNG to JPEG, or Google's WebP web file format to JPEG or PNG in Windows, open File Explorer, and make sure the box next to File name ...

You can convert a JFIF file to JPG, though the two formats are nearly identical, and most software will open a JFIF file as a JPG. On a Mac, you need to rename the JFIF file extensions to JPG and then ...