Stop fighting your diagrams.

You shouldn't need a PhD in Mermaid syntax to draw a flowchart.

Sound familiar?

“I just spent 20 minutes trying to figure out why my sequence diagram won’t render. Turns out I had a typo in ‘participant’.”

— Every developer, at some point

“Copy diagram to Mermaid Live Editor. Make change. Copy back. Repeat 50 times. There has to be a better way.”

— The context-switching nightmare

“I renamed ‘UserService’ to ‘AuthService’ in the diagram. Now I have to find and replace it in 15 other places. Manually.”

— No refactoring support

The problem isn’t Mermaid. It’s the tooling.

Mermaid is brilliant — diagrams as code that live with your documentation. But writing Mermaid in a plain text editor is like writing Java without an IDE.

Without proper tooling

Syntax errors only appear when you try to render
Error messages are cryptic and unhelpful
No autocomplete — memorize every keyword
Can’t navigate or refactor diagram elements
Switch between editor and browser constantly

With Mermaid Studio

Errors highlighted as you type, before you render
Clear messages pointing to the exact problem
Smart completion for keywords and node references
Rename, find usages, go to definition — it all works
Live preview panel right in your IDE

See it in action.

flowchart TD
  subgraph Problem["The Old Way"]
      A[Write diagram] --> B[Copy to browser]
      B --> C[See error]
      C --> D[Guess what's wrong]
      D --> A
  end

  subgraph Solution["Mermaid Studio"]
      E[Write diagram] --> F[See live preview]
      F --> G[Instant error feedback]
      G --> H{Fixed?}
      H -->|Yes| I[Done]
      H -->|No| E
  end

What you get.

Syntax Highlighting

Every keyword, node, edge, and style is colored. Immediately see what’s what in your diagram.

Live Preview

See your diagram render as you type. Side-by-side, vertical, or full-screen — your choice.

Instant Validation

Errors are highlighted before you render. Hover for details. Click for quick fixes.

Code Completion

IntelliSense for Mermaid. Press Ctrl+Space and let the IDE suggest keywords and node names.

Refactoring

Rename a node, all references update. Shift+F6 works just like you’d expect.

Markdown Support

Mermaid blocks in your README get the same treatment. No separate files needed.

All 20 Mermaid diagram types. Full support.

FlowchartSequenceClassStateER DiagramGanttPie ChartMindmapTimelineKanbanGit GraphUser JourneyQuadrantRequirementC4 DiagramSankeyXY ChartBlockPacketArchitecture