This app is built (or rather will be built ⌛) around the video game Factorio
This app will turn in-game generated or taken from platforms such as factorioprints.com a blueprint string (Which is just a stringified JSON, encoded using Base64) and first turns it into a plain JSON object and then using that JSON and also Javascript and HTML5 Canvas, this app will generate an image of the factory that this blueprint represents, so in return we end up with something like this:
This image then can be downloaded and posted on platforms such as Reddit, for example