Edit markdown wikis with AI-powered WYSIWYG editor

OpenKnowledge is a markdown editor with a full true WYSIWYG mode, so editing markdown files feels like editing a Google Doc or Notion page. It is built for knowledge bases, LLM wikis, specs, and notes, and describes itself as private, local, and free. It ships as a desktop app for macOS, Windows, and Linux, and as a web UI, both with a file navigator, search, tabs, and a graph viewer for wiki links. AI editing is integrated side by side with Claude, Codex, OpenCode, Pi, and other harnesses, and any harness or agent can connect through MCP or the CLI.

Beyond plain editing, it provides out-of-the-box MCP, skills, and agentic search for LLM wikis, second brains, and knowledge graphs, optional no-code team sharing and auto-sync powered by git and GitHub under the hood, and embeddable HTML plus rich components for writing engineering specs and visualized reports.

Use it by opening any existing folder that contains markdown or mdx files, such as a codebase, a wiki, or an Obsidian vault. The project frames it as Notion meets VS Code: start with it as a plain WYSIWYG editor for existing files, then use the starter packs when you want an LLM wiki, a second brain, or a more structured knowledge base. The app walks you through installing the MCP server and skills for the agent harnesses it detects, and git-based sync can be switched on later.

Pick the desktop installer for Apple Silicon Macs, Windows 10+, or Linux. Intel Macs and servers have no desktop build and should use the web app, which needs Node.js 24+ and git.

Input is a folder of markdown or mdx files, or a new project scaffolded from a starter pack. Output is the same files edited in WYSIWYG mode, with AI-assisted editing, plus MCP and skill integrations wired up for the harnesses found on your machine.

Desktop installers are published at openknowledge.ai/download and on the GitHub latest release:

• macOS (Apple Silicon): open the DMG and drag OpenKnowledge to Applications.
• Windows 10+ (x64 or Arm64): run the Setup installer, which installs per user with no admin prompt.
• Linux (x64 or arm64): install the deb package on Debian or Ubuntu, or the rpm package on Fedora or RHEL.

The web app runs the same editor locally on any platform:

npm install -g @inkeep/open-knowledge
cd your-project

Then ok init scaffolds the project and wires up your AI editors, and ok start --open serves the web editor and opens it in the browser.

Detects and installs MCP servers and skills for Claude Code, Claude Desktop, Cursor, Codex, OpenCode, and OpenClaw, and supports side-by-side editing with Claude, Codex, OpenCode, and Pi. Sync and sharing use git and GitHub, with no separate backend to run.

People building or maintaining an LLM wiki, second brain, knowledge base, or spec collection who want a real WYSIWYG editor on Windows, macOS, or Linux with AI harnesses connected directly, instead of editing raw markdown by hand. Licensed under the GNU General Public License v3.0 or later.