You saved an image from the web and it landed as mypic.jfif instead of .jpg. Some apps open it, some do not, and you just want a normal JPG. Good news: a JFIF file is a JPEG — the fix is trivial.
So what is JFIF?
JFIF stands for JPEG File Interchange Format. It is the standard container that almost every “JPEG” already uses. In other words, .jfif and .jpg hold the same lossy image data — only the file extension differs. There is no quality difference and nothing is wrong with the file.
Why did my download become a .jfif?
This is usually a Windows quirk. A registry setting can make Chrome, Edge and other apps save JPEGs with the .jfif extension instead of .jpg. It is harmless, but annoying because:
- Some older programs and upload forms only recognise
.jpgor.jpeg. - Thumbnails and “open with” defaults can behave oddly.
How to convert JFIF to JPG (or PNG)
Because the data is identical, converting is instant and lossless in practice. These tools run entirely in your browser — nothing is uploaded:
- JFIF to JPG — rename it to the extension everything accepts.
- JFIF to PNG — if you specifically need a lossless PNG copy.
Drop the file in, download, done — now it opens and uploads everywhere.
How to stop getting JFIF files
If it keeps happening on Windows, you can change the file association so JPEGs save as .jpg again (via a registry edit for the .jfif MIME type). If you would rather not touch the registry, just run each download through JFIF to JPG — it takes a couple of seconds and keeps your files tidy.