AVIF has been getting a lot of tech press, but Jon Sneyers is hot on JPEG XL (which makes sense as he’s the “chair of the JPEG XL ad hoc group in the JPEG Committee”). According to Jon’s comparison, JPEG XL comes out on top on everything, except low fidelity compression, and offers progressive rendering which none of the other next-gen codecs do. But WebP (not to be confused with the upcoming WebP2!) has something of a leg up now that it has support across all the major browsers.
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