JXL WinThumb is a free WIC decoder that adds JPEG XL to Windows, so .jxl files show real thumbnails in File Explorer and open in Paint, Photos and other imaging apps on systems too old for Microsoft's own extension.

JXL-Winthumb screenshots

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How to Download JXL-Winthumb

1 Click the DOWNLOAD button for your preferred link (US/EU Main or Mirror). When prompted by your browser, choose "Save" and select a destination folder.
2 We recommend using the mirror links (EU MIRROR / US MIRROR) first - they tend to be faster and more reliable than external sources.
3 Having trouble downloading JXL-Winthumb? If the download doesn't start, click the link again or try a different browser (Firefox/Chrome). Some security software may block downloads due to false positives.