SimpleMD

Fast, minimalist markdown editor with Mermaid diagram support

SimpleMD is a fast, minimalist markdown editor that lives in your browser's side panel. Write and preview markdown in real-time with a clean, distraction-free interface. Key Features: • Live preview with instant rendering • Mermaid diagram support for flowcharts, sequence diagrams, and more • KaTeX math formula support • Syntax highlighting for code blocks • Multiple export options: PDF, PNG, HTML, and raw Markdown • Copy Mermaid diagrams to clipboard (PNG) • Google Drive sync to access your notes anywhere • File explorer with folder organization • Dark and light themes • Works offline — your notes are saved locally • Full-window mode for focused writing • Side panel mode for quick notes AI & Developer Tools (NEW): • MCP integration — push markdown directly from AI coding tools like Claude Code or Cursor • Auto-preview Mermaid diagrams generated by AI • List and update files from your terminal • Secure local connection — your data never leaves your machine • Works with any MCP-compatible client • Install with: npm install -g simplemd-mcp Perfect for developers, writers, students, and anyone who loves markdown. Open SimpleMD from your browser's side panel and start writing immediately — or connect your AI tools and let them write for you