Crazy story: ImgBB added JXL support just three days after I requested it And here's probably the first ever JXL image: ibb.co/qYhKZSVP (a 1893 byte "screenshot" of Volcov Commander running in MS-DOS). **Edit: I was wrong, there's no proper support yet: uploaded JXL files are converted to JPEGs and served as JPEGs**. I've requested support once again.