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Already on WebP? AVIF typically takes another 20–50% off the same image, transparency included.
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This is an optimization step for sites that already did the obvious work. WebP was a large jump from JPG and PNG; AVIF is a smaller but still worthwhile jump beyond WebP, generally landing 20–50% lighter at matched quality with the biggest gains on photographs, gradients and detailed textures. Flat interface graphics and small icons gain the least — sometimes nothing — so measure before converting an entire asset library. Both formats support alpha, so transparency survives untouched. Because you are re-encoding lossy data, keep quality at 80 or above. In production, list AVIF first inside a `<picture>` element with your existing WebP directly beneath it, and the browser picks whichever it can decode.
For photographs and detailed images, usually yes — 20–50% further savings. For small flat icons the gain is often negligible, so measure first.
Yes. Both formats support a full alpha channel.
No. Keep WebP as the fallback in a <picture> element; AVIF support is good but slightly narrower.
Slightly, since WebP is already lossy. Staying at quality 80 or above keeps it imperceptible.
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