JPEG XL

Industry-leading image compression & fidelity

Smaller Files, Higher Quality, Faster Downloads.

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.

JPEG XL is…

Up to 55% Smaller Than JPEG

JPEG

JPEG XL

JPEG JPEG XL

Image Title

JPEG Info:

Quality: 82

Size: 2.0 KB

BPP: 2.0

SSIMULACRA2 Score: 80.1

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100

Butteraugli Score: 1.5

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2.5

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1.5

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0.5

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DSSIM (×1000) Score: 2.1

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JXL Info:

Distance: 9, Effort: 7

Size: 2.0 KB

BPP: 2.0

SSIMULACRA2 Score: 80.1

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Butteraugli Score: 1.5

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DSSIM (×1000) Score: 2.1

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Size:

0.0
KB
SSIMU2: 99.9

Med-Low

Medium

Med-High

High

Size:

0.0
KB
SSIMU2: 99.9

SSIMU2 SCORE:

72.5
300 KB

Small

Medium

Large

X-Large

SSIMU2 SCORE:

80.0
290 KB

Up to 25% Smaller Than AVIF

AVIF

JPEG XL

AVIF JPEG XL

Image Title

AVIF Info:

Quality: 82

Size: 2.0 KB

BPP: 2.0

SSIMULACRA2 Score: 80.1

0

10

20

30

40

50

60

70

80

90

100

Butteraugli Score: 1.5

3

2.5

2

1.5

1

0.5

0

DSSIM (×1000) Score: 2.1

16

14

12

10

8

6

4

2

0

JXL Info:

Distance: 9, Effort: 7

Size: 2.0 KB

BPP: 2.0

SSIMULACRA2 Score: 80.1

0

10

20

30

40

50

60

70

80

90

100

Butteraugli Score: 1.5

3

2.5

2

1.5

1

0.5

0

DSSIM (×1000) Score: 2.1

16

14

12

10

8

6

4

2

0

Size:

0.0
KB
SSIMU2: 99.9

Med-Low

Medium

Med-High

High

Size:

0.0
KB
SSIMU2: 99.9

SSIMU2 SCORE:

72.5
300  KB

Small

Medium

Large

X-Large

SSIMU2 SCORE:

80.0
290  KB

Visually Lossless Compression

Faithful High-Fidelity

JPEG

JPEG XL

JPEG Image

SIZE:

SIZE:

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.

Lossless Compression

Pixel-Perfect Reproduction, Tiny Footprint

WEBP

15%

Larger

PNG

46%

Larger

AVIF

63%

Larger

BMP

75%

Larger

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.

Lossless JPEG Transcoding

Old-School to New-School — and Back

JPEG

JPEG XL

JPEG Image

SIZE:

SIZE:

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.

Wide-Gamut & HDR

Stunning Color Accuracy

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.

Progressive Image Delivery

Responsive By Design

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).

Fast Encoding & Decoding

Save and Load Without Waiting

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.

Capture Through Delivery

One Format, Endless Possibilities

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.

Environmental Impact

If all current JPEGs were delivered as JPEG XLs (with an average 20% decrease in file size), we could save:

4.87

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.

And Much More

CMYK & Print Support

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.

High Bit Depth Support

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.

Fully FOSS

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.

Future-Proof

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.

Automatic Visual Fidelity Targeting

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.

Photographic & Non-Photographic Images

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.