Question 1

What is Mermaid.js?

Accepted Answer

Mermaid.js is an open-source JavaScript library that renders text-based diagram definitions into SVG graphics. It supports flowcharts, sequence diagrams, Gantt charts, class diagrams, ER diagrams, pie charts, and more. QTool.io's Mermaid Editor provides a free online environment to write and preview Mermaid diagrams instantly.

Question 2

Can I export my diagrams as images?

Accepted Answer

Yes, QTool.io's Mermaid Diagram Editor supports exporting to both SVG and PNG formats. SVG exports are vector-based and scale perfectly at any size. PNG exports are rendered at 2x resolution for crisp images suitable for presentations and documentation.

Question 3

Is this Mermaid editor free to use?

Accepted Answer

Yes, this Mermaid diagram editor is completely free to use with no signup or account required. It runs entirely in your browser, so your diagram code never leaves your device. Your work is automatically saved to your browser's local storage.

Question 4

What types of diagrams can I create?

Accepted Answer

You can create flowcharts, sequence diagrams, Gantt charts, class diagrams, entity-relationship (ER) diagrams, and pie charts. The editor includes ready-made templates for each diagram type to help you get started quickly.

Question 5

Does the editor auto-save my work?

Accepted Answer

Yes, the editor automatically saves your Mermaid code to your browser's local storage as you type. When you return to the page, your last diagram will be restored automatically. Note that clearing your browser data will remove saved diagrams.

Free Mermaid Diagram Editor

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Free Mermaid Diagram Editor

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