Compare your original JPEG with a JPEG XL version. Inspect the images, compare file sizes, and explore how a modern image format can reduce storage requirements while preserving visual quality.
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Load both files to compare their sizes. The calculations use the actual file sizes on disk, not estimates of image quality.
Select an image in each panel to calculate the size difference.
JPEG has been one of the most widely used photo formats for decades. JPEG XL (JXL) is a newer image format designed to provide efficient compression alongside features suited to modern imaging. Its goal is not simply to make files smaller, but to offer a flexible format for photography, graphics, professional workflows and the web.
JPEG became popular because it made photographic images much smaller than uncompressed image data and gained exceptionally broad support across cameras, computers, websites and apps.
JPEG XL was designed as a modern, flexible image format. Depending on the encoder settings and source image, it can achieve smaller files at comparable visual quality or preserve more quality at a similar file size.
Efficient compression can reduce storage and transfer costs for large photo collections, websites, archives and cloud libraries. The actual savings depend on the image and encoding settings.
JPEG XL supports high bit depths and a wider range of colour workflows. This is valuable for gradients, editing, HDR displays and demanding photographic work.
Supported JPEG files can be transcoded into JPEG XL without further loss of their original JPEG image data. This can save space without recompressing the image lossily.
JPEG XL supports high dynamic range and wide-gamut imagery, helping preserve bright highlights and colour information in workflows that use compatible displays and software.
JPEG XL can handle alpha transparency and animated image sequences, so it can serve use cases beyond ordinary photographic files.
Progressive decoding and flexible image representation can help in suitable delivery workflows, depending on decoder, application and implementation support.
JPEG XL is a strong candidate for modern image storage and delivery because it combines efficient compression with features that traditional JPEG was not designed to provide. For photographers, web publishers and people maintaining large image libraries, it offers an appealing way to balance file size, image quality and advanced colour capabilities.
Its future, however, depends on adoption. Browsers, operating systems, image editors, content platforms and hardware workflows need reliable support before it can replace JPEG in everyday use. JPEG remains the safer choice when maximum compatibility is essential.
Important: JPEG XL does not automatically make every image smaller. Results depend on the source, encoder, quality setting and whether lossy or lossless compression is used. Compare the actual files and check image quality before deciding which format is best for your workflow.
Preview compatibility: This page uses the browser's native
image decoder. Some browsers do not support JPEG XL in an ordinary
<img> element, so a JXL file may show its details and
file size without displaying a preview. This page does not convert the
JXL file or include a separate decoder.