Stitch

Stitch by Google is a free AI UI designer from Google Labs. Describe your app, or upload a sketch or screenshot, and it generates app screens you can connect into a clickable prototype. Refine by chatting, voice, or annotating the screen. Export to Figma or as frontend code, or send the project to Firebase Studio. Free with a Google account. It is an experiment, so the output is a starting point for a developer to finish, not a production backend.