JPEG XL vs AVIF for web use-cases jakearchibald.com

Jake Archibald’s comparison finds AVIF generally produces smaller lossy web images and decodes faster than JPEG XL, with especially large size advantages for screenshots, illustrations and transparency. JPEG XL can win on some photos and is substantially better for lossless images; Archibald recommends defaulting to AVIF 4:4:4 at high effort and testing JPEG XL when AVIF files seem unusually large.