Convert JPG to AVIF Online — Free
Runs 100% in your browser — your files never leave your device.
AVIF routinely beats both JPEG and WebP on size at equal quality — the best compression of any format browsers display. If your browser can encode AVIF (Chrome and friends), this tool produces it locally; otherwise it tells you plainly rather than failing silently.
How it works
- 1
Drop your JPG file
Drag a JPEG into the box, or click to browse. Nothing is uploaded.
- 2
Convert to AVIF
The photo is encoded as AVIF if your browser supports it.
- 3
Download the result
Save the AVIF with one click, or drop another file to convert.
About this tool
Converting JPG to AVIF
A JPG file jpg trades detail for small files with lossy compression, and carries no transparency. AVIF avif is the newest of the modern formats — the best compression of any widely supported image format, with growing but still uneven tool support.. Converting moves your image from the first set of trade-offs to the second: file size shifts with the format's compression style, transparency survives where supported, and pixel data is re-mapped to the target format exactly.
What to check after converting
Open the result and check the two things conversion can change: transparency and size. Transparency is carried over exactly where the target format supports it. AVIF compresses lossily, so this conversion re-encodes your image — reasonable settings keep the difference invisible, extreme ones do not. Remember the source was already lossy: converting to AVIF preserves what arrived, it cannot restore what earlier compression discarded. Your original file stays untouched on your device either way, and the download is a brand-new file.
Frequently asked questions
Will converting to AVIF improve the quality?
No conversion improves quality that compression already removed — moving JPG to AVIF preserves what arrived and stops further loss, but the artifacts baked into the source stay baked in. The gains are about features: transparency, compatibility, or editing headroom.
Is my image uploaded anywhere?
No — the conversion runs entirely in your browser. The image is processed on your device and never sent to any server, which you can verify by disconnecting after the page loads.
Why convert JPG to AVIF instead of the other way around?
The direction follows what the destination needs: cutting-edge web compression versus photos and web uploads. Converting back is always available — but each lossy hop re-encodes the image, so keep the highest-quality format as your working copy and convert toward the destination.