Privacy Policy for PrivyMermaid

Last Updated: May 26, 2026

Overview

PrivyMermaid ("the Extension") is a local-first Mermaid diagram editor. This Privacy Policy explains how we handle information when you use our Chrome extension.

Core Privacy Principle

PrivyMermaid operates entirely locally on your device. No data is collected, transmitted, or stored externally by the extension or its developers.

1. User Data Collection

PrivyMermaid does NOT collect, harvest, or transmit any personal or sensitive user data.

Specifically, the extension does not collect:

• Personal identifiers (name, email, account details)
• Your Mermaid diagram source code or templates
• Prompts or text inputs sent to the local AI model
• Browsing history or visited URLs
• Usage statistics, telemetry, or analytics

2. User Data Handling

Your data is handled locally within your browser and your local system:

• Diagram Rendering: Diagram source code compilation and rendering run offline using local copies of the Mermaid library. No external rendering APIs or CDNs are contacted.
• Local AI Inference: If you use the optional AI helper features, the extension communicates directly with your local Ollama instance (typically at http://localhost:11434 or http://127.0.0.1:11434). All prompts and diagram corrections are processed entirely on your machine.
• Context Menus: Right-click context selection passes text only locally to the extension's editor page. No external network request is made.

3. User Data Storage

All editor configurations and diagram source files are stored locally on your device:

• Diagram List: Stored locally using Chrome's local storage API (diagram name, source, and timestamps).
• Settings & Templates: Local Ollama server URLs, model preferences, and custom prompts are stored locally in Chrome's storage.

This data is strictly sandboxed to the extension on your machine and never synced to external cloud databases. You can clear this data at any time by clearing extension storage or uninstalling PrivyMermaid.

4. User Data Sharing

We do not share, sell, or transmit any data to any party. PrivyMermaid contains no analytics, telemetry, or tracking libraries. No data is shared with the developers or any third-party services.

5. Contact Information

For privacy-related questions, support, or inquiries, please contact us:

• Email: support@kenelite.com
• Support page: privy.kenelite.com/privymermaid/support

PrivyMermaid is a non-commercial, open-source product; we do not guarantee response times.