PrivyMermaid
PrivyMermaid is a Mac diagram editor for creating, editing, and previewing Mermaid charts locally with an offline-first workflow.
What is PrivyMermaid?
PrivyMermaid is a diagram editor for Mermaid syntax that helps developers, engineers, and technical writers create visual documentation on Mac. It is designed for writing and previewing flowcharts, sequence diagrams, Gantt charts, and other Mermaid-based diagrams in a native app workflow. The app focuses on local use, so users can work on architecture notes, documentation drafts, and internal diagrams without depending on a cloud editor. Its user-facing capabilities include live diagram preview, theme selection, and support for standard Mermaid diagram types. Recent releases also describe optional AI-assisted features and support for local model workflows, which can be useful for drafting, fixing, or refining diagrams while keeping work on the device. For Mac users who want a dedicated Mermaid editor instead of a browser-based tool, PrivyMermaid fits a developer-tools workflow centered on private technical diagramming.
Key features
- Write and edit Mermaid diagram code in a dedicated desktop editor
- Preview flowcharts, sequence diagrams, Gantt charts, and other Mermaid diagrams live
- Use the app offline for local diagram creation and review
- Switch between Mermaid themes such as Light, Dark, Forest, and Neutral
- Export diagrams for sharing, including PNG output
- Refine or generate diagrams with optional AI-assisted tools
- Use local AI model workflows for private on-device assistance when configured
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Safety overview
Status: Mostly safe
PrivyMermaid is a diagramming app for Mermaid documents, and privacy-focused local editing is consistent with its purpose. Features that connect to local or custom AI endpoints can expose diagram content to whatever model service you configure, so check those settings before using sensitive material. If you enable built-in or local model downloads, expect additional disk usage for model files. The listed bundle ID matches a Mac app naming pattern, but you should still confirm the app is signed as PrivyMermaid before granting network access to external AI endpoints.
Recommendation: Keep PrivyMermaid if you actively create Mermaid diagrams or want a dedicated offline editor for technical documentation. If you do not use Mermaid workflows, you can remove it with little impact beyond losing its local documents, settings, and any downloaded model assets tied to the app.
Common paths
/Applications/PrivyMermaid.app
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