Free Online JFIF to JPG Converter
A JFIF is already a JPEG - this gives it the .jpg extension apps expect.
Up to 50 MB per file. Sign up free to convert files up to 100 MB.
| File name | Size | Convert to |
|---|
Checking files and selected output formats.
JFIF to JPG: renaming, essentially
JFIF and JPG are the same format. JFIF names the interchange format that specifies how JPEG data is stored in a file, and .jpg is simply the extension that won. Windows and Outlook sometimes save with the .jfif extension, and applications that match on extension rather than content then refuse to open a file that is already a perfectly ordinary JPEG. Nothing is re-encoded here.
Convert when software rejects the file purely because of its extension, the usual reason anyone needs this. Renaming the file yourself achieves the same result, because the bytes are already correct.
JFIF vs JPG: Side-by-side
Technical comparison of the two formats, useful for deciding which to use, or for confirming what changes during conversion.
| Property | JFIF | JPG |
|---|---|---|
| Full name | JPEG File Interchange Format | JPEG (Joint Photographic Experts Group) |
| Year introduced | 1992 | 1992 |
| Developer / standard body | C-Cube Microsystems | JPEG Committee |
| MIME type | image/jpeg | image/jpeg |
| File extension | .jfif / .jpg | .jpg / .jpeg |
| Compression | Lossy (DCT-based, same as JPEG) | Lossy (DCT-based) |
| Color / data depth | 24-bit | 24-bit truecolor |
| Max dimensions / size | 65,535 × 65,535 px | 65,535 × 65,535 px |
| Transparency | No | No |
| Animation | No | No |
| Standard / specification | JFIF / ISO/IEC 10918 | ISO/IEC 10918 |
| Best for | A specific JPEG header variant, functionally identical to JPG for display | Photos, web images, email attachments |