superHTML

Your HTML files, but they remember.

Upload an interactive HTML file, share one link, and every visitor's state saves itself. No backend, no database, no accounts for your viewers.

Start uploadingSee how it works

Three steps

  1. Upload

    Drop in a self-contained HTML file. Checklists, trackers, calculators, dashboards.

  2. Share

    You get an ordinary URL. Send it to anyone, on any device.

  3. It remembers

    Each visitor's data saves to their own private slot and comes back on their next visit.

Four calls, that's the API

await window.persist.set("appState", data);
const data = await window.persist.get("appState");
await window.persist.remove("appState");
await window.persist.clear();

Your tool talks to a sandboxed bridge. It never sees the database, never sees other visitors' data, and never touches the parent page.