Microsoft JPEG XR HttpModule for IIS enables websites to transparently take advantage of the JPEG XR image format by automatically redirecting requests for JPEG and PNG images to a JPEG XR version (if one exists). This IIS module is currently deployed on the research.microsoft.com website where the use of JPEG XR can reduce the size of images by as much as 50% and their download time by as much as 45%; these gains are achieved without any extra effort from Microsoft Research staff because the JPEG XR image format has been fully integrated into the publishing platform of the website.