Convert JFIF to AVIF
Free, instant and private — your JFIF files are converted right in your browser and never uploaded to a server.
How to convert JFIF to AVIF
- Step 01
Add your JFIF files
Drop them into the box above or click to browse. You can add several files at once.
- Step 02
Conversion starts instantly
It runs in your browser using its built-in image engine — no upload, no queue, no waiting.
- Step 03
Download your AVIF files
Save each file individually or grab them all at once. Done.
Why convert JFIF to AVIF?
A .jfif file is a regular JPEG with an unusual extension. Converting it to AVIF — the most efficient mainstream image format — both fixes the compatibility problem and shrinks the file dramatically, ideal when the image is headed for a website. The encoding runs in your browser; nothing is uploaded.
JFIF vs AVIF at a glance
JFIF is a regular JPEG wearing a .jfif extension — same image data, but many apps and forms reject the name. AVIF is the newest mainstream image format — outstanding compression, but support outside browsers is still patchy.
| Property | JFIF | AVIF |
|---|---|---|
| Extension | .jfif | .avif |
| Full name | JPEG File Interchange Format | AV1 Image File Format |
| First released | 1992 | 2019 |
| Developed by | Eric Hamilton / C-Cube Microsystems | Alliance for Open Media |
| Compression | Lossy | Lossy |
| Transparency | No | Yes |
| Animation | No | Yes |
| Best for | JPEG images saved with an unusual extension | next-generation web images with maximum compression |
JFIF to AVIF — frequently asked questions
Is this JFIF to AVIF converter really free?
Yes — completely free, with no sign-up, no watermarks and no daily limits.
Are my JFIF files uploaded to a server?
No. The conversion happens entirely on your device using your browser's built-in image engine. Your JFIF files never leave your computer or phone — which is also why the conversion is nearly instant.
Will I lose quality converting to AVIF?
AVIF uses lossy compression, so the image is re-encoded at high quality (92%). For photos the difference is practically invisible; for text-heavy graphics or logos, a lossless format like PNG preserves sharp edges better.
Why is AVIF smaller than JFIF?
A .jfif is really a JPEG, and AVIF uses the modern AV1 codec, which compresses far more efficiently — often at half the size for the same visual quality.
Do all browsers support AVIF?
Every current browser displays AVIF. A few older ones don't, so keep a JPG or WebP fallback if you need to support them.