Convert WebP to AVIF

Converting WebP to AVIF is worth doing when the destination matters more than the source. WebP is built for web images, roughly thirty percent smaller than JPG at similar quality. AVIF is built for the smallest modern web images, at the cost of slower encoding. Which one you want depends entirely on where the image is going next.

Both are modern formats and this is purely a size optimisation, typically saving another twenty percent or so. Since WebP is already lossy, keep quality high to avoid compressing twice. If you have the original, converting from that gives a better result than re-encoding the WebP.

AVIF is the largest saving available from an already compressed source, frequently half the size of JPG at matching quality. Encoding is noticeably slower and support covers current browsers but little else, so it suits images you are delivering over the web rather than files someone else must open.

Both WebP modes are decoded here, lossy and lossless, which not every converter handles. The image is unpacked to raw pixels before re-encoding, so a lossless WebP passes through with its exact pixel data intact.

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