JFIFAVIF
JFIF to AVIF Converter
Convert JFIF images to AVIF in seconds. Your files are processed locally in your browser — nothing is uploaded.
Processed locally in your browser
Why convert JFIF to AVIF?
Windows often saves images from the web with the .jfif extension, and many upload forms, editors and phones do not recognise it. AVIF offers the best compression of any widely supported format — often around half the size of JPG.
What changes when you convert JFIF to AVIF
- AVIF files are usually noticeably smaller than JFIF files for the same image.
- AVIF uses lossy compression. At the default quality (85) the difference is invisible for most images; raise it for maximum fidelity or lower it for smaller files.
How to convert JFIF to AVIF
- 1
Drop your JFIF files into the converter above, paste them, or click to choose files.
- 2
AVIF is already selected as the output format. Open Settings to adjust quality, size or metadata.
- 3
Click Convert. Each image is processed on your device in a moment.
- 4
Download your AVIF files one by one, or all together as a ZIP.
Private by design
This JFIF to AVIF converter runs entirely in your web browser using the same image engines that display web pages, plus WebAssembly encoders where needed. Your images are never uploaded for this conversion and nothing is stored.
JFIF to AVIF: questions & answers
Is converting JFIF to AVIF free?
Yes, completely free with no sign-up, no watermark and no daily limit.
Will I lose quality converting JFIF to AVIF?
AVIF is a lossy format, so a small amount of detail is traded for size. At quality 85–95 the difference is not visible for typical images. You can raise the quality in Settings.
Can I convert multiple JFIF files at once?
Yes. Drop as many files as you like; they are converted in parallel and can be downloaded individually or as a single ZIP.
Are my JFIF files uploaded?
No. The conversion runs locally in your browser, so your images never leave your device.
Does it work on iPhone and Android?
Yes. The converter works in current versions of Safari, Chrome, Firefox and Edge on phones, tablets and computers. Very large images may exceed the memory available to mobile browsers.
Why do my images save as .jfif?
On some Windows PCs the registry associates the image/jpeg content type with the .jfif extension, so the browser uses it when saving JPEG images. The image itself is a normal JPEG.