Open source. Ready for your folder.

CollabMD

Work together.
Keep your files.

Turn your Markdown folder into a shared workspace for docs, diagrams, and decisions. No migration required.

Try live demo Run it yourself

Plain files on disk. A shared space in the browser.

YOUR FOLDER, OPEN TOGETHER
CollabMD workspace with a file explorer, Markdown source, diagram preview, and collaborator presence.
A real workspace. Markdown, diagrams, and people in one view.

Keep what works. Add each other.

Your knowledge already has a home.
Now it has room for your team.

Start where your docs live.

Open an Obsidian vault, a docs repo, or a plain Markdown folder. Keep editing in your favorite tools; external file changes appear in the workspace.

Opening a file leaves its contents untouched.

Get to the decision together.

Edit Markdown in realtime. Follow a collaborator, talk in chat, and anchor feedback to a passage or an Excalidraw element.

Find open discussions in the comment overview.

Give your agent the context.

Connect an MCP client to search, read, edit, and create supported files. Query Bases and inspect or update Excalidraw diagrams.

Connect AI agents

More than a page of text

Keep the diagram
beside the decision.

Write the RFC, sketch the architecture, and review both in the same workspace.

Write & connect
Markdown, wiki-links, backlinks, HTML, and Bases
Diagram & explain
Mermaid, PlantUML, Structurizr, Excalidraw, and draw.io
Share & take away
PDF previews; HTML, DOCX, PDF, and source ZIP exports

Multiple vaults

Separate projects. One place.

Switch between configured vaults from the sidebar. Each keeps its own files, search, and Git context.

Git review

See what changed.

Review diffs, stage files, and create a commit from the browser when your changes are ready.

Scoped agent access

Choose what AI can do.

Protected workspaces use named Agent Connections with read or edit scopes, expiry, and revocation.

See the shared workspace

Less back-and-forth.
More side by side.

Watch the editor and preview work together, then open the public demo and try it in your browser.

Try live demo

Prefer your own files? Start locally.

Markdown and diagrams, with a live preview as you work.

Your folder is the starting point

Bring a folder.
Open a browser.

Start on your machine, then share a protected workspace with your collaborators.

macOS, Linux, or Windows via WSL2.
Requires Node.js 26 for npx; ripgrep for global search. Docker includes the runtime and ripgrep.

Full installation guide 
npx collabmd@latest ~/my-vault --no-tunnel

Then open http://localhost:1234. No global install required.

Documentation

From first run
to your team's setup.

Pick the guide for your next step.

Guides maintained in the GitHub repository

Your files. Your tools. Your people.

Make room for
working together.

Try live demo Run CollabMD yourself