JFIF to PNG Converter

How it works (spoiler: you mostly just drop the file)

What even is a JFIF file and why does Windows keep making them

JFIF stands for JPEG File Interchange Format. It is technically the formal specification that all JPEG files follow. So here is the funny part: every JPG you have ever opened is actually a JFIF file on the inside. The image data is identical. The format is identical. The only thing that differs is the file extension.

So why do some files end in .jfif instead of .jpg? Mostly because of Microsoft Edge and Windows 10 and 11. When you right-click an image in Edge and save it, some versions of Windows save it with the .jfif extension instead of .jpg. There is no good reason for this. It causes problems because most apps recognize .jpg and .jpeg but not .jfif, even though the file inside is exactly the same thing.

The other place .jfif files show up is on older Windows systems and in some image editing software that is strict about using the official format name as the extension. Either way, the image data is fine. It is just the name causing drama. Want the full story? We wrote it up properly in What Is a JFIF File? — including where the format came from and why Edge does this to you.

jif, jiff, jfif — people spell it every way, and that's fine

Half the people who end up here type "jif to png" or "jiff to png" into a search box, because who on earth remembers "jfif". The good news: whatever you call it, it is the same file. This converter accepts .jfif and .jif directly. If Windows gave your file some other creative spelling, rename the extension to .jfif and drop it in — the converter reads the actual image data, not the name.

One caveat: a .jif file is occasionally an ancient GIF-adjacent format from the 90s rather than a JPEG. If a .jif refuses to convert, that is probably what you have. They are rare enough that you will likely never see one.

Why convert to PNG instead of just renaming it?

You can often just rename the file from .jfif to .jpg and it will work, because JFIF is a JPEG. Most apps care about the extension, not the actual format. That is exactly what the JPG instant button on each converted file does — a byte-identical copy with a new name, no re-encoding, no quality change, done before the click finishes. If you want JPG, use it; it is strictly better than re-encoding.

PNG is the right choice when you need the file to work absolutely everywhere without questions — uploaders that whitelist .png, design tools, documentation, anything picky. PNG is lossless, so you are not stacking new compression artifacts on top of the JPEG compression that already happened. The trade-off is size: the PNG will usually be larger than the original.

Short version: JPG rename when you want small and instant, PNG when you want universal and lossless. This page gives you both from the same drop, so you do not actually have to decide in advance.

Stop Windows from creating JFIF files in the first place

If you are tired of this whole dance, you can tell Windows to knock it off. The .jfif extension comes from a registry entry for the image/jpeg MIME type. Open the Registry Editor (press Win+R, type regedit), navigate to HKEY_CLASSES_ROOT\MIME\Database\Content Type\image/jpeg, and change the Extension value from .jfif to .jpg. From then on, Edge saves images as .jpg like a normal browser.

Fair warning: only do this if you are comfortable in the registry. If not, converting the occasional stray file here takes two seconds and touches nothing on your system.

Frequently asked questions