Mermaid Chart

Create, edit, and fix diagrams

Category: Content & Design
Primary Subcategory: Diagramming & Flowchart Tools

Integration details

Description

Validates Mermaid syntax, renders diagrams as high-quality SVG, and displays them instantly in an interactive UI where users can preview, zoom, and iterate in real time.

Integration type: Plugin
Verification status: Not applicable
Platform: ChatGPT
Category: Content & Design
Primary Subcategory: Diagramming & Flowchart Tools
Secondary Subcategories: None listed
Brand: Mermaid Chart
Access: Account required
First tracked: 2026-09-16
Tool count: 5
Geography: US

ChatGPT Plugin Discovery Score

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Primary Subcategory

Competing in ChatGPT Diagramming & Flowchart Tools

View Category

Listed in alphabetical order

Primary Subcategory

B&A: DiagramsComing soonGet notified

ChartqueryComing soonGet notified

EraserComing soonGet notified

IcePanelComing soonGet notified

LucidComing soonGet notified

Mermaid ChartComing soonGet notified

Tools

5 tools agents can invoke

Use this tool to display a Mermaid diagram in an interactive UI widget. - The widget renders the diagram directly in the browser using the Mermaid library — no external service required. - The widget shows the diagram code, a "Copy Code" button, and the rendered diagram. - If the diagram has a syntax error, the widget will show the error and offer a repair option. Tips: - Always prefer this tool over using code blocks. - Use documentID when updating an existing diagram that already has a documentID. - If the user asks to update selected diagram after listing diagrams, check widget state to see which one they have selected.
display_mermaid
Lists the user's saved Mermaid diagrams from their Mermaid.ai account.
list_personal_diagrams
Use this tool to repair an invalid Mermaid diagram: - The tool will attempt to fix the syntax error and render the corrected diagram to a UI widget. - Provide the broken diagram code and the error message from the previous validation attempt.
repair_diagram
Use this tool to save the diagram to the user's account. The tool will save the diagram and return the updated diagram information.
save_diagram
Use this tool to update the diagram in the user's account. The tool will update the diagram and return the updated diagram information.
update_diagram

Mermaid Chart FAQ

How do I improve a ChatGPT Plugin's discoverability?

The levers are the listing surface agents actually read: names, descriptions, keywords, tool metadata, and registry health. Which lever matters depends on where discovery breaks, which is what continuous measurement shows.

What are Mermaid Chart alternatives on ChatGPT?

As of 2026-09-29, Mermaid Chart competes with B&A: Diagrams, Chartquery, Eraser, IcePanel, Lucid, Make A Viz, Octopus.do, uniformchart in ChatGPT Diagramming & Flowchart Tools, ranked by public Discoverability Score.

Where is this profile measured?

This profile uses the geography attached to the latest public registry snapshot: US. Locale tags are intentionally omitted.

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ChatGPT Plugin discovery is coming soon

Competing in ChatGPT Diagramming & Flowchart Tools

5 tools agents can invoke