JFIF to JPG Converter — Free, Instant, No Upload

JFIF stands for JPEG File Interchange Format. A .jfif file is a JPEG image — the same kind of data as a .jpg file. Only the file ending is different.

That ending is the whole problem. Some apps, upload forms and websites check the ending, see .jfif instead of .jpg, and reject a perfectly good photo.

Why do you get .jfif files? On Windows it's usually a system setting: Windows can link JPEG images to the .jfif ending, and browsers then save downloaded pictures that way. Microsoft's forum answers note that some Windows updates switch it back.

The fix is to give the file a .jpg ending. That's exactly what this converter does: it checks the file is a real JPEG and hands the same image data back as a .jpg. Nothing is re-compressed, so there's no quality loss. You can also rename the file yourself — handy to know on a computer — while this page works anywhere, including phones that won't let you rename files.

There's no quality change at all. The converter hands back the same JPEG data under a .jpg name — in our test the file came back byte for byte identical, 133,060 bytes in and 133,060 bytes out.

Because the image isn't changed, no watermark is added on the free tier either.

If a file is named .jfif but isn't really a JPEG inside, the converter decodes it and saves a proper JPG at quality 85 instead. Those files get the free-tier watermark, like any other converted image.