zoltan-dulac/html5ImageConverter

A series of scripts that convert image files into new image formats (APNG, WEBP, JPEG-2000, JPEG-XR) with HTML code using <picture> that works in all browsers

HTML5 Image Converter

A very quickly written converter for HTML5 image formats (JPEG, WEBP, JPEG 2000, JPEG-XR and APNG).
Also creates JPEGs with alpha channels via an SVG wrapper.

More details on my blog post: http://www.useragentman.com/blog/2015/01/14/using-webp-jpeg2000-jpegxr-apng-now-with-picturefill-and-modernizr/