Open sourceCanvas for Claude Code

A canvas for
your running app.

See your pages side by side on an infinite canvas. Edit the code in your favourite editor and see the changes live.

View on GitHub Download for Mac

Free and open source. For macOS 14 and later.

Official Mac download: 0.6.2 (10). The source includes later changes.

Any AI Agent

Claude Code, Cursor, Conductor — drive the canvas with MCP

Your agent drives the canvas from your editor. Claude Code, Cursor, Codex, Conductor — use MCP to add pages and capture screenshots from your terminal. Capabilities vary by app and bridge version.

Multi-Viewport

Desktop, tablet, mobile — side-by-side

Render the same screen across every viewport at once. Catch the responsive break the AI missed before you ship.

Design Canvas showing desktop, tablet, and mobile viewports side-by-side

I built Design Canvas because I wanted a Figma-like infinite canvas for the apps I'm building. One view to visually iterate, compare every screen, and design and code faster with AI — without leaving my editor.

Charlie Ellington

Design Engineer · Built Design Canvas

Agent Control

Your AI agent controls the canvas.

Claude Code, Cursor, Conductor — any MCP-compatible agent drives the canvas through MCP. List pages, add routes and capture screenshots.

~/design-canvas

Example MCP workflow

$ npx design-canvas-mcp

> Tell Claude: "Add /settings and /billing to the canvas"

✔ list_routes        → 12 routes available
✔ add_route          → /settings at (1200, 400)
✔ add_route          → /billing  at (1600, 400)
✔ capture_canvas     → screenshot saved

Capabilities depend on your app and MCP versions. Check the repository for current source support; the Mac download may differ.

How it works

See the canvas update as your agent changes the code

Build your app

With any tools — Cursor, Claude Code, Bolt, your IDE.

Run it locally

Start your dev server. Any framework, any port.

Open Design Canvas

Every page appears as a frame on one infinite canvas.

Your AI agent controls the canvasvia MCP

Add routes, capture screenshots, compare viewports — all from Claude Code or Cursor.

Or do it all directly in the app.

Ready to see your app?

Point Design Canvas at your dev server. Every page appears, live, on an infinite canvas.