PrivyMermaid (iOS)

Overview

PrivyMermaid is the essential privacy-focused Mermaid diagram editor for iOS. Designed for developers and technical writers on the go, it lets you write, edit, and preview diagrams completely offline. Your data never leaves your device—no cloud, no tracking, no account required.

Features

Offline rendering — Instantly visualize Mermaid code into diagrams without an internet connection
Live preview — See diagram changes in real-time as you edit the source
Theme selection — Choose from Light, Dark, Forest, and Neutral Mermaid themes
Multi-format export — Export diagrams as SVG, PNG, or Mermaid source files (.mmd) via the iOS share sheet
Full Mermaid syntax — Flowcharts, Sequence diagrams, Gantt charts, Class diagrams, and more
Local storage — All diagrams saved on-device with no account required

Privacy First

PrivyMermaid stores everything locally on your iPhone or iPad. Your diagrams, source code, and settings never leave your device. No analytics, no advertising, no third-party tracking SDKs. Whether you're working on proprietary systems or simply prefer offline tools, PrivyMermaid is the lightweight, secure choice for diagramming on the go.

PrivyMermaid Pro

PrivyMermaid Pro combines the security of offline editing with the power of your own Local LLM. Connect directly to your self-hosted Ollama instance to generate, fix, and refactor Mermaid diagrams using AI—all while keeping your data within your local network.

Free vs Pro

Capability	Free	Pro
Offline Diagram Preview	✅	✅
Mermaid Source Editing	✅	✅
Theme Selection	✅	✅
Export (SVG, PNG, .mmd)	✅	✅
AI Ask — Generate Diagrams	❌	✅
AI Fix — Auto-correct Syntax	❌	✅
LAN Ollama Connection	❌	✅
Streaming AI Responses	❌	✅

AI-Powered Diagramming

Just Ask — Describe a workflow or system in plain English, and watch the AI generate complex Mermaid code for you
Smart Fix & Refactor — Have a broken diagram or messy code? The "Fix" tool uses your local LLM to correct syntax errors and optimize layouts instantly
LAN Ollama Support — Connects securely to your local Ollama server (e.g., http://192.168.1.x:11434)
Real-time Streaming — Experience live code generation as the AI streams the response directly to your editor

Why PrivyMermaid Pro?

Perfect for power users running Llama 3, Mistral, or Gemma. Stop manually writing boilerplate code—let your local AI handle the syntax while you focus on the architecture. All AI processing stays on your local network.