Does it work offline / can I use it without an internet connection?

The generator itself runs on cncfoam.com's server, so you need internet to reach the page. BUT — there's no third-party AI service in the loop, so we're not at the mercy of OpenAI / Anthropic uptime, rate limits or pricing. The math runs on a single small PHP file on our VPS.

If you want true offline operation (the whole tool, including AI, working with no network), that's the **offline-first PWA** roadmap item. Not yet shipped.