Question 1

Is this Mermaid & Markdown viewer really free?

Accepted Answer

Yes. Viewing, editing, exporting and sharing Mermaid diagrams and Markdown is 100% free with no login required.

Question 2

Do I need to sign up to use the AI diagram generator?

Accepted Answer

The core viewer and Markdown editor need no account. AI-powered features (English → Mermaid, Explain, Fix) require a free MyCrew account to attribute usage and prevent abuse.

Question 3

Which Mermaid diagram types are supported?

Accepted Answer

Flowchart, Sequence, Class, Entity-Relationship (ER), Gantt, State, Pie, Mindmap and Git graph.

Question 4

Can I export diagrams to PNG or PDF?

Accepted Answer

Yes. Export to SVG, PNG (2× hi-DPI), print-to-PDF, or copy the image directly to your clipboard.