Someone is running a website entirely off an ESP32 with 520 KB of RAM, and you can too

The HelloESP project by Tech1k on GitHub demonstrates hosting a fully functional website on an ESP32 microcontroller with just 520 KB of RAM and no backend servers. Despite being slow, the site features a live sensor dashboard, historical CSV charts, a visitor country map, outdoor weather data via a Cloudflare Worker proxy, and a guestbook with moderation and rate limiting. The creator's own HelloESP website is publicly accessible and running on the device. The project was built purely for fun and to explore the limits of what a microcontroller can handle.