Developer-First Features

Markdown-first tools that get out of your way. Fast, simple, and code-centric.

Three Document Types. All Markdown.

Documentation, diagrams, and slideshows. All created with markdown. No design tools, no switching between apps.

Markdown Documents

Write in markdown with live preview. Syntax highlighting, code blocks, and keyboard-first workflow. Perfect for technical documentation, API docs, and notes.

  • Live preview as you type
  • Syntax highlighting for code blocks
  • Support for tables, lists, and formatting
  • Embed images and diagrams

Slideshow Presentations

Create presentations in markdown. Separate slides with `---`. No PowerPoint, no design tools. Just markdown and keyboard shortcuts.

  • Markdown-based slide creation
  • Fullscreen presentation mode
  • Keyboard navigation (arrows, space, Enter)
  • Click anywhere to advance slides
  • Slide counter and controls

Mermaid Diagrams

Create standalone diagram documents with full-screen viewing, interactive zoom/pan, and templates. All in markdown syntax—no drag-and-drop interfaces.

  • Full-screen diagram viewing
  • Interactive zoom and pan
  • Template library for quick starts
  • Split-view editor with live preview
  • Support for all Mermaid diagram types

Why MerDoc?

Built for developers who prefer code over design tools

All-in-one platform

Other tools do one thing: Marp for slides, Mermaid Live for diagrams, GitBook for docs. MerDoc does it all in one place. No switching between tools.

Embed diagrams in documents

Unlike Mermaid Chart or Mermaid Live, you can embed Mermaid diagrams directly in your markdown documents. Mix documentation and diagrams seamlessly.

Free to use

Currently free. We may charge a minimal amount in the future, but for now, everything is free. No credit card required.

Passwordless login

Just enter your email. No password to remember, no password manager needed. Magic link authentication keeps it simple.

Easy sharing

Share via email addresses or generate readonly share links. Simple permissions, no complex access controls.

Markdown-first

Everything is markdown. Version control friendly, no lock-in, no proprietary formats. Your content, your control.

Developer Workflow Features

Tools that fit into your workflow. Fast, simple, and markdown-first.

Runnable Code Blocks

Execute code directly in your documents! Like Jupyter notebooks, but in markdown. Run JavaScript, TypeScript, Python (via Pyodide), and render HTML with live output.

  • Execute JavaScript and TypeScript code
  • Run Python code in the browser (Pyodide)
  • Render HTML with live preview
  • Capture console output and errors
  • Interactive code execution with play/reset buttons

Document Templates

Save and reuse document templates for documents, slideshows, and diagrams. Includes built-in templates for common use cases, or create your own.

  • Save any document as a template
  • Built-in templates for common scenarios
  • Template picker when creating new documents
  • Organize templates by document type
  • Quick start with pre-configured structures

Tags & Organization

Organize documents with tags for easy filtering and discovery. Keep your workspace organized without complex folder hierarchies.

  • Add multiple tags to documents
  • Filter documents by tags
  • Quick tag input with autocomplete
  • Visual tag badges

Comments & Threading

Add threaded comments to documents for collaborative discussions. Context-aware feedback with reply threads.

  • Add comments to documents
  • Threaded replies for discussions
  • Permission-based commenting (viewer, commenter, editor)
  • Edit and delete your own comments

Mermaid Diagrams in Documents

Embed diagrams directly in your documents. Unlike Mermaid Chart or Mermaid Live, you can mix diagrams with documentation in one place. No switching tools.

Image Management

Upload once, use anywhere. Automatic optimization and a simple media library. No complex asset management workflows.

Easy Sharing

Share via email addresses or generate readonly share links. Simple permissions, no complex access control systems.

Fast & Reliable

Built on Cloudflare's edge network. Fast load times, reliable uptime. Your documents are accessible when you need them.

Passwordless Login

Just enter your email. No password to remember, no password manager needed. Magic link authentication keeps it simple and secure.

Markdown Editor

Write in markdown with live preview. Syntax highlighting, code blocks, and keyboard-first workflow. No WYSIWYG, just code.

Ready to get started?

Start creating documentation, diagrams, and slideshows today. Free, passwordless, and markdown-first.

Get Started