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The claims here are really sus. Why compare to a 25+ yr old format rather than anything more modern like AVIF? Why claim HDR support, without making it clear that gain maps (an important part of HDR in varying environments) are not supported, yet they are in AVIF?

Chrome for Developers@developer.chrome.com

Chrome 155 adds support for JPEG XL (.jxl) → goo.gle/4yYpSjW Expect 30-50% smaller file sizes than traditional JPEGs, native HDR, progressive rendering, and lossless JPEG transcoding. Under the hood, Chrome uses jxl-rs, a pure Rust decoder built for maximum memory safety and performance.