Mermaid Live Editor

Create beautiful flowcharts, sequence diagrams, and more with Mermaid markdown syntax

Code Editor

Preview

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What is a Mermaid Live Editor?

A Mermaid live editor is a powerful online tool that lets you create professional diagrams using simple text-based syntax. Mermaid is a JavaScript-based diagramming and charting tool that renders Mermaid markdown into beautiful visual diagrams in real-time.

With our free Mermaid diagram editor, you can create various types of diagrams including flowcharts, sequence diagrams, class diagrams, state diagrams, entity relationship diagrams, and more. Simply type your diagram code and watch it come to life instantly!

Example Diagrams

Click on any example to load it into the editor

Mermaid Flowchart

A simple flowchart showing decision logic

graph TD
    A[Start] --> B{Is it working?}
    B -->|Yes| C[Great!]
    B -->|No| D[Debug]
    D --> B
    C --> E[End]

Mermaid Sequence Diagram

Visualize interactions between components

sequenceDiagram
    participant User
    participant Browser
    participant Server
    User->>Browser: Enter URL
    Browser->>Server: HTTP Request
    Server->>Browser: HTTP Response
    Browser->>User: Display Page

Class Diagram

Show class structures and relationships

classDiagram
    Animal <|-- Dog
    Animal <|-- Cat
    Animal : +String name
    Animal : +int age
    Animal : +makeSound()
    class Dog{
        +String breed
        +bark()
    }
    class Cat{
        +String color
        +meow()
    }

Gantt Chart

Project timeline visualization

gantt
    title Project Schedule
    dateFormat YYYY-MM-DD
    section Planning
    Research        :2024-01-01, 7d
    Design          :2024-01-08, 5d
    section Development
    Backend         :2024-01-13, 14d
    Frontend        :2024-01-20, 14d

Why Use Our Mermaid Editor?

✨ Real-Time Preview

See your diagrams update instantly as you type. No need to manually refresh or re-render.

📥 Export Options

Download your diagrams as SVG for scalability or PNG for easy sharing and embedding.

💾 Save & Share

Save your diagrams to your account and share them publicly with a simple link (login required).

🎨 Multiple Diagram Types

Create flowcharts, sequence diagrams, class diagrams, Gantt charts, and more with simple syntax.

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