JFIF vs JPG
| Property | JFIF | JPG |
|---|---|---|
| Full name | JPEG File Interchange Format | JPEG (Joint Photographic Experts Group) |
| File extensions | .jfif | .jpg, .jpeg, .jpe |
| Created by | C-Cube Microsystems (Eric Hamilton), later ITU and ISO | Joint Photographic Experts Group (ISO and ITU) |
| Introduced | 1992 | 1992 |
| Compression | Lossy JPEG, identical to a .jpg file inside | Lossy: each save throws away detail you rarely notice |
| Transparency | No | No |
| Animation | No | No |
| Typical size | — | About 2–5 MB for a 12-megapixel phone photo |
| Opens on | Opens wherever JPG does, but some upload forms reject the .jfif extension | Every phone, computer, browser, printer and upload form |
| Best for | Nothing special: it is a JPEG with an unusual extension | Photos you share, print or upload anywhere |
Why convert JFIF to JPG?
JFIF stands for JPEG File Interchange Format, the standard way JPEG images have been stored since 1992. Almost every .jpg file is technically JFIF. The .jfif extension appears because of a Windows registry setting: on some PCs, images saved from Chrome or Edge get .jfif instead of .jpg. The picture is fine; the extension is what trips up upload forms, phones and older apps.
There are two fixes. You can rename the file from photo.jfif to photo.jpg, which works because the data is identical. Or you can convert it here, which is easier for many files and guarantees a clean, standard JPG. The tool re-saves at quality 95 by default, so the change is invisible. Choose PNG if you want a lossless copy for editing, or see JFIF to PNG.
To stop Windows using .jfif, the usual fix is to open the registry key HKEY_CLASSES_ROOT\MIME\Database\Content Type\image/jpeg and change its Extension value from .jfif to .jpg. If you are not comfortable editing the registry, converting or renaming is the safer route.