Sketch Material 3 apps in the browser and export exact AI prompts

You can now draw Material 3 apps in your browser and turn them straight into AI coding prompts.

Developer lnkiai released M3E Canvas, an open-source web app for sketching Material 3 Expressive interfaces. You drag components onto a canvas, link screens with tap or swipe transitions, and tune theme colors and shapes. The repository picked up 4,269 GitHub stars this week.

Why it matters: Plain text prompts usually struggle to explain UI layouts, forcing AI tools to guess spacing and component choices. M3E Canvas converts your visual canvas—including z-orders, side-by-side rows, and screen flows—into a concise prompt built for tools like Cursor, Claude Code, or Codex.

Know this: The app runs entirely in your browser with no backend server. You can target either Android or web code outputs, toggle screens between phone and desktop sizes, and export designs as PNGs or shareable links.

Vibe coding just got a visual front end.