App Builder — describe it, watch it build

Describe it. Watch it build.

Say what you want in plain English and it is written in front of you, then runs in the panel beside it — a single HTML file with everything inside, which you can download and open anywhere, host on any server, or hand to a developer. Nothing is uploaded: the build happens in this browser, on whichever free engine you have connected.

What should it do?

Your app appears here and runs immediately.

What to expect

It is good at self-contained things: calculators, forms, dashboards from data you paste, timers, quizzes, landing pages, small games, visualisations. It is not good at anything needing a server, a database, logins or payments — a single file cannot hold those, and any AI that claims otherwise is writing code that will not run. If a build comes out wrong, say what is wrong in the change box rather than starting again; it repairs faster than it rewrites.