What Is a JFIF File (and How to Turn It into a JPG)?
Images saved from the web sometimes end in .jfif and upload forms reject them. Here's what JFIF is, why Windows does it, and how to convert to JPG.
You save an image from a website, try to upload it somewhere, and get "file type not supported". The file ends in .jfif. What happened?
JFIF is just JPEG
JFIF (JPEG File Interchange Format) is the standard container that almost every JPEG uses internally. A .jfif file is a normal JPEG with an unusual extension. Windows assigns .jfif to downloaded JPEGs because of a registry setting, and Chrome then uses it when you "Save image as".
Convert JFIF to JPG losslessly
Because the data is already JPEG, no re-compression is needed. The JFIF to JPG converter saves the same image data with a .jpg extension (and strips hidden metadata while it's at it), so there's zero quality loss. It handles many files at once.
You can also simply rename the file from .jfif to .jpg. Make sure file extensions are visible (File Explorer > View > Show > File name extensions).
Stop Windows saving .jfif files
- Press Win+R, type
regeditand press Enter. - Go to
HKEY_CLASSES_ROOT\MIME\Database\Content Type\image/jpeg. - Change the
Extensionvalue from.jfifto.jpg.
Back up the registry before editing it. If that's too fiddly, just convert files when you need to.
Not sure what a file really is?
The file type checker reads a file's signature and tells you its true format, whatever the extension says.