The iPhone 16 family now supports JPEG XL, a next-generation image encoding standard that promises improved image quality and smaller file sizes compared to standard JPEG files. Despite its technical advantages, the format has not been widely adopted, with popular web browsers like Chrome and Firefox not natively supporting JPEG XL. Apple has integrated JPEG XL into its software iterations for over a year, with the iPhone 16 Pro offering improved image quality and better compression performance. While JPEG XL offers significant benefits like reduced environmental impact and smaller file sizes, its adoption may vary depending on individual workflow and platform support.
https://petapixel.com/2024/09/18/why-apple-uses-jpeg-xl-in-the-iphone-16-and-what-it-means-for-your-photos/