JPEG XL is a new international standard (ISO/IEC 18181) created by the JPEG committee. This website is an unofficial, community-maintained resource promoting the JPEG XL format. The official website can be found at jpeg.org.
Unmatched in quality-per-byte, JPEG XL delivers best-of-breed image compression from web quality through lossless.
Say goodbye to JPEG artifacts and WebP’s inconsistent results. When quality matters, make it indistinguishable from the original at a fraction of the size — automatically. JPEG XL is visually lossless at less than half the bits-per-pixel of JPEG.
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Unlike its predecessors, JPEG XL delivers best-of-breed lossless compression making pixel-precision smaller than ever — at up to 32 bits per channel. It handily beats WebP on complex content without the 8-bit and size limitations. AVIF? Not even close.
Transcode existing JPEGs to JPEG XL for an average 20% savings. Plus, it’s reversible. Restore original JPEGs with minimal computation — so fast you can do it on the fly.
Your phone and displays have supported wide-gamut and HDR for years — shouldn’t your file format too? JPEG XL is specifically designed to handle the rich colors of high-precision, high-dynamic range images.
With JPEG XL’s state-of-the-art progressive encoding and decoding, you’ll see an image sooner than with other formats — with as little as 15% of the image loaded. It supports both saliency progression (visually important areas of the image delivered first) and reordering (middle data sent first).
Graphs adapted from JPEG XL and the
Pareto Front
(Jon Sneyers, Cloudinary blog, February 2024).
Nobody likes progress bars. JPEG XL is designed to be blink-of-an-eye fast on today’s systems — no special hardware required. When comparing image size versus encoding speed, JPEG XL wins hands down for high quality and lossless photo-like content.
JPEG XL is the first format to offer optimal performance throughout the entire creative workflow, from capture in high bit-depth, HDR, and wide-gamut formats, through editing, web, and print delivery. Because of its industry-leading lossless and lossy compression, JPEG XL provides the most versatile and efficient solution — something AVIF can’t do.
If all current JPEGs were delivered as JPEG XLs (with an average 20% decrease in file size), we could save:
GWh
(gigawatt-hours)
per day
Equivalent to powering 487,000 average US homes for an hour and saving 3,500 metric tons of CO2 emissions per day.
JPEG XL streamlines image authoring with features like layer support, up to 4099 channels for selection masks and spot colors, and CMYK compatibility for print-oriented use cases. It’s an ideal format for all creative workflows.
Up to 32 bits per channel for higher precision image representation, enabling more accurate color reproduction — billions instead of millions of colors. Ensure your images maintain their vibrancy in the most demanding applications.
Royalty-free and open-source (FOSS) with a BSD-3 license, JPEG XL’s libjxl
reference implementation is production-ready, efficient, and robust.
With continuous performance updates, you can use it confidently in your apps and platform.
JPEG XL is a future-proof format designed to outlast its predecessors. With no inherent limitations on image size or color precision, its flexible framework allows the addition of new features and functionality seamlessly and gradually — over time, as needed.
No more JPEG or WebP quality roulette! JPEG XL lets you target visual fidelity, not cryptic parameters. It defaults to visually lossless output, ensuring consistent results without the need for trial and error.
While best-in-class for compressing photographic images, JPEG XL is even better at efficiently compressing and storing non-photographic (synthetic) images such as graphics, illustrations, and digital art.