After some days work, the first test version of the HTML5 version is ready! ildaGen can now run straight from your browser, without installing any programs, on any operating system including Mac and Linux!
http://bitlasers.com/ildagen
Keep in mind it is full of bugs, and browser support is a bit messy. If it does not work properly, try using another browser. Particularily the exporting seems to be broken in certain browsers.
Hmm, I am certainly not a HTML5 guru, so I don't know how much I can help.. I used a proprietary engine to create this program, and it seamlessly supports HTML5 export as well as windows, so it was not very hard at all to port it. The only real work I had to do was find a way to generate and save the files, and for that I used https://github.com/eligrey/FileSaver.js/, as well as fix some random bugs