JPG compatibility
JPG works in nearly every image viewer, form, and office app. Converting from AVIF creates a copy from decoded pixels and keeps the source dimensions.
JPG uses lossy compression. Higher quality keeps more visible detail; the exact file size varies by image and is shown before download.
Transparency and limits
JPG has no transparency channel. Transparent AVIF pixels are blended onto the selected background colour.
AVIF decode support depends on the browser and the image profile. Animated or unusual variants may not open, and an animated image is reduced to the frame exposed by the browser decoder.