PrivyMermaid (macOS)

Native macOS Mermaid diagram editing and preview

Overview

PrivyMermaid is a native macOS app for editing and previewing Mermaid diagrams. Optional local Ollama integration for Generate, Fix, and Refactor AI assistance. All data stays on your Mac.

Features

Diagram editing — Create and edit Mermaid diagrams with live preview
Local storage — Diagrams, settings, and prompt templates saved in Application Support
Ollama integration (optional) — Configure local Ollama endpoint for AI assistance
Import/Export — Uses macOS sandbox "user-selected file" access
No account, no cloud sync — No login required. Data stays entirely local.

Privacy Commitment

PrivyMermaid does not collect, transmit, or sell your personal data. No analytics, advertising, or third-party tracking. All content stays on your Mac. Optional network use only for connecting to your configured Ollama instance.

privymermaid-cli Guide

Requires PrivyMermaid version 1.4.0 or above.

Assuming the App is installed at /Applications/PrivyMermaid.app:

1) Copy the embedded CLI

cp "/Applications/PrivyMermaid.app/Contents/MacOS/privymermaid-cli" "/usr/local/bin/privymermaid-cli"

2) Remove the original signature and apply a local ad-hoc signature

codesign --remove-signature "/usr/local/bin/privymermaid-cli"
codesign --force --sign - "/usr/local/bin/privymermaid-cli"

3) Verify

/usr/local/bin/privymermaid-cli --help

If you don't have write permissions for /usr/local/bin, you can use ~/bin instead:

mkdir -p ~/bin
cp "/Applications/PrivyMermaid.app/Contents/MacOS/privymermaid-cli" ~/bin/privymermaid-cli
codesign --remove-signature ~/bin/privymermaid-cli
codesign --force --sign - ~/bin/privymermaid-cli
~/bin/privymermaid-cli --help

Screenshots

PrivyMermaid macOS Main Interface — Native macOS Interface

PrivyMermaid macOS Diagram Editing — Diagram Editing & Preview

PrivyMermaid macOS AI Features — AI Generate & Fix