Freero

npx add-mcp 'https://freero.app/mcp'

Freero

A free, open-source (MIT) real-time collaborative whiteboard: an infinite canvas for teams and their AI agents to brainstorm, plan, diagram and run workshops together. Claude, ChatGPT and other MCP clients read boards and propose changes that people accept.

Use it free at freero.app, or self-host it from one Docker image (deployment). Key facts: freero.app/facts.

What's in it

• Canvas — infinite pan/zoom, dot grid, minimap, snapping and alignment guides, multi-select, resize/rotate, groups, lock, undo/redo, copy/paste across boards, drag-and-drop import.
• Content — sticky notes, 21 shapes, rich text, connectors (straight/elbow/curved, attached, labelled), pen + highlighter + eraser, images, emoji and stamps, frames, task cards, mind maps, tags, PDFs, video and audio that play on the board, and file cards for any other file.
• Collaboration — live sync, cursors and selections, avatars, follow a collaborator, "bring everyone to me", emoji reactions, comment threads, owner/editor/commenter/viewer roles, share by invite or link.
• Facilitation — voting sessions, a shared timer, presentation mode over frames.
• Templates & export — 586 original templates (retrospectives, planning, workshops, diagrams, strategy and more); export PNG/JPG/SVG, frames to PDF, copy as image.
• Dashboard — boards grid/list, search, filters, stars, live thumbnails, duplicate, sharing.

Run it

Requires Node 22+.

npm install
npm run dev          # server on :4000 + web on :5173

Open http://localhost:5173 and log in with the seeded demo account demo@freero.app / freero123 (development only), or sign up. http://localhost:5173/board/local is an offline sandbox board that needs no server.

Production:

npm run build && npm start     # serves the built web app and the marketing site (apps/site) on :4000
docker compose up --build -d   # or the full stack: proxy, 2 app replicas, Postgres, Redis, MinIO, Mailpit on :8080

Deploying for real: docs/deployment.md · every setting: docs/configuration.md · backups, monitoring, incidents: docs/operations.md.

Configuration: PORT (default 4000), FREERO_DATA_DIR (default ./data — the built-in PGlite database in data/pg + uploads), DATABASE_URL (use a real Postgres instead), DATABASE_POOL_MAX (default 10). Had boards from before the move to Postgres? Stop the dev server and run npm run db:import-sqlite once.

Develop

Command	What it does
npm run check	Architecture boundaries + typecheck + unit tests
npm run verify	Real-session end-to-end check: real server, real Yjs WebSocket clients, roles, persistence
npm run new:feature <name> -- …	Scaffold a feature folder (see ARCHITECTURE.md)
node scripts/ui-shot.mjs --url … --out …	Drive the real UI in headless Chromium and screenshot it

Freero follows the Dune method: features are isolated folders discovered by reserved file names, every piece of state has one writer, and forbidden dependencies fail npm run check with an error that names the supported path. Read ARCHITECTURE.md before changing code.

Stack: React 18 + TypeScript + Vite, Yjs (CRDT) over WebSockets, Express + ws, PostgreSQL (pg; PGlite for dev/tests), Playwright for UI verification.

License

MIT. Dependencies are kept to permissive licences (MIT, Apache-2.0, MPL-2.0); GPL, AGPL and source-available projects are integrated at the protocol level only, never vendored.