FAQ
Frequently asked questions
Everything about MermaidCreator and the Mermaid diagramming language — in plain answers.
What is MermaidCreator?
MermaidCreator is an online editor for Mermaid diagrams that combines three ways to work in one app: a drag-and-drop visual canvas, a Mermaid code editor with live preview, and AI generation. You can sketch a flowchart by dragging nodes, type Mermaid syntax directly, or describe a diagram in plain English and let AI draw the first draft — then export the result as PNG, SVG, or PDF.
Is MermaidCreator free to use?
Yes. The free plan lets you use the visual and code editors, render live Mermaid previews, keep up to 10 saved diagrams, run 5 AI generations per month, create public share links and embeds, see your recent version history, and export to PNG and SVG. You can start drawing without an account; signing up adds cloud saves. The Pro plan unlocks unlimited AI generations, unlimited saved diagrams, full version history, and PDF export.
How much does MermaidCreator Pro cost?
MermaidCreator Pro costs $9 per month, or $90 per year (two months free). Pro includes unlimited AI diagram generations with Claude, unlimited saved diagrams, and PNG, SVG, and PDF export. You can upgrade or cancel at any time from your dashboard.
What is Mermaid and why use it?
Mermaid is an open-source, text-based diagramming language: you write diagrams as plain-text code and a renderer turns them into flowcharts, sequence diagrams, and more. Because the source is text, Mermaid diagrams are portable, easy to version-control in Git, and render natively in GitHub, GitLab, and many docs tools. MermaidCreator gives that text format a visual editor and AI assistance so you don't have to memorise the syntax.
Which diagram types does MermaidCreator support?
MermaidCreator supports the core Mermaid diagram types: flowcharts, sequence diagrams, class diagrams, entity-relationship (ER) diagrams, state diagrams, Gantt charts, pie charts, and Git graphs. Ready-made templates are available for each type to give you a starting point.
Can I generate diagrams from a text prompt with AI?
Yes. MermaidCreator's AI is powered by Claude. You can generate a complete diagram from a single sentence, restructure an existing diagram with a follow-up prompt, or auto-repair broken Mermaid syntax. The free plan includes a set number of AI generations; the Pro plan makes them unlimited.
Do I need to know Mermaid syntax to use MermaidCreator?
No. You can build diagrams entirely on the visual canvas by dragging and connecting nodes — MermaidCreator writes clean Mermaid code for you in the background. You can also describe what you want and let AI generate it. The code editor is there when you want fine-grained control, but it is optional.
How do I export and share my diagrams?
You can export diagrams as PNG and SVG on the free plan, with PDF added on Pro. Diagrams can also be published as a live public share link or embedded directly in documents, wikis, and README files, so the rendered diagram stays up to date wherever it appears.
Can I edit Mermaid diagrams visually instead of writing code?
Yes — that is the core of MermaidCreator. Drag nodes onto an infinite canvas, connect them, and edit labels directly; every change regenerates the underlying Mermaid code. Visual edits and code edits stay in sync, so you can switch between the canvas and the code editor at any time and the live preview always reflects the latest state.
Are my diagrams private?
Diagrams you create are private to your account by default. They only become publicly accessible if you explicitly create a share link or embed for a specific diagram. Shared diagrams are reached through an unguessable URL and are never listed in the public sitemap or search index.
Still have a question?
The fastest way to understand MermaidCreator is to try it — no account needed to start.
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