> I would argue that even if JPEG XL isn't the best choice for Web images, if browsers don't support it then that will widely hinder its adoption for its non-Web use cases.

Both Firefox and Chrome [1] have committed to shipping JPEG XL later this year. Safari has supported JPEG XL since 2023, though their implementation doesn't support progressive images yet.

So the major web browsers will support JPEG XL later this fall.

[1]: "Intent to Ship: JPEG XL" - https://hacks.mozilla.org/2026/08/intent-to-ship-jpeg-xl/