Glossary
JPEG XL
JPEG XL
JPEG XL is a royalty-free image format that compresses photos and graphics into smaller files than JPEG at similar quality. It supports lossy and lossless compression, transparency, animation, and HDR color.
It can also convert an existing JPEG into a JPEG XL file without losing any quality, so you can shrink an image library without re-exporting. Chrome 155 and Firefox 158 turned on support by default in October 2026, and Safari has supported it for longer. Browsers that do not support it need a fallback such as PNG or JPEG, so check support before you rely on it for a live site.
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