PrivyMermaid
Extension Actions
Private, local-first Mermaid diagram editor. Generate, Ask & Fix with local Ollama—all in one page.
🔒 PrivyMermaid - Private Mermaid Editor with Local AI
PrivyMermaid is a local-first Mermaid diagram editor. Generate diagrams from a description, edit in the editor, and use a local LLM (Ollama) to ask, fix, or refactor—your diagrams and prompts never leave your machine.
✨ KEY FEATURES
📐 Mermaid Editor & Live Preview
• Edit Mermaid source in a split-pane layout
• Instant SVG preview with theme support (default, dark, forest, neutral)
• Zoom and validate diagrams
• Export to SVG, PNG, or .mermaid source
🤖 Local AI: Generate, Ask & Fix
• Generate: describe what you want in natural language; get Mermaid code (flowchart, sequence, state, etc.)
• Ask: questions about your diagram (Ollama chat with diagram context)
• Fix Diagram: paste broken Mermaid + error message, get corrected code
• Refactor: improve readability while preserving meaning
• Editable prompt templates in Settings → Prompt…
📁 Local-First
• Multiple diagrams stored in chrome.storage.local
• Search, open, delete from the diagram list
• No account, no cloud—everything stays on your device
🔒 Privacy First
• All AI runs locally via Ollama—no data sent to external servers
• Mermaid bundle included for fully offline diagram rendering
• Optional: use Ollama only when you need Ask/Fix
🚀 HOW IT WORKS
1. Install Ollama locally (optional—for Generate/Ask/Fix features)
2. Open PrivyMermaid from the extension icon or Command+Shift+M (Ctrl+Shift+M)
3. Generate: describe your diagram → Generate → Apply. Or paste/type Mermaid; see live preview
4. If render fails, use Fix tab → Fix Diagram to get corrected code from local AI
5. Export as SVG, PNG, or .mermaid file
🛠️ REQUIREMENTS
• Chrome (Manifest V3)
• Ollama (optional): http://localhost:11434 for Ask/Fix. Recommended model: qwen2.5:7b or similar
💡 USE CASES
• Generate Mermaid diagrams from a short description (flowchart, sequence, state, etc.)
• Quick editing and preview without leaving the browser
• Fix broken Mermaid syntax with local AI
• Refactor diagrams for readability
• Export diagrams for docs or presentations
• Fully offline diagram editing (no CDN)
🔐 PRIVACY COMMITMENT
• No telemetry or analytics
• No cloud services required for editing or preview
• AI (Generate/Ask/Fix) runs only on your machine via Ollama
• Your diagrams and prompts never leave your device
Perfect for developers and writers who value privacy and want a fast, local Mermaid editor with optional AI help.