I've added a script to generate SVG files from the JSON layout files. Pull request is here: https://github.com/technomancy/atreus-firmware/pull/17 Script usage: ./atreus-layout-to-svg.sh qwerty.json Output is a html file with the SVG embedded: qwerty.json.html. The script relies on the jq(http://stedolan.github.io/jq/) tool and sed so this might make it tricky to get working on windows. Let me know if you try it out. Cheers, Aaron.