The ones most people actually use do not support JXL. Namely, for better or worse, Windows Photo Viewer and MacOS Preview. Nor does any web browser (except experiment flags that nobody knows about).
Adobe supports it... for importing, but you can't export to JXL. You can count plenty of obscure photo formats like JPEG 2000, IFF, PCX, OpenEXR, etc. in that category.
Adobe supports it... for importing, but you can't export to JXL. You can count plenty of obscure photo formats like JPEG 2000, IFF, PCX, OpenEXR, etc. in that category.