Privacy Policy
Last updated: December 22, 2025
1. Introduction
Welcome to Mermaid Visualizer. This Privacy Policy explains how we handle information when you use our ChatGPT application that creates and visualizes Mermaid diagrams.
2. Information We Collect
No Account Required: Mermaid Visualizer does not require user registration or account creation.
Session Data Only: We only process session-level data necessary for rendering diagrams within your ChatGPT conversation. This includes:
- Mermaid diagram syntax you provide through ChatGPT
- Diagram titles and descriptions
- Temporary rendering data
No Persistent Storage: We do not store your diagrams, code, or personal information on our servers. All content stays within your ChatGPT session unless you explicitly export it.
3. How We Use Your Information
The session data we process is used solely to:
- Render Mermaid diagrams in real-time
- Provide interactive editing capabilities
- Enable diagram export functionality
- Validate Mermaid syntax
4. Cookies and Tracking
We use minimal cookies for analytics purposes only. We do not use cookies for tracking, advertising, or storing personal information.
5. Third-Party Services
Mermaid Visualizer operates within ChatGPT and is subject to OpenAI's privacy policies for data handled by the ChatGPT platform. We recommend reviewing OpenAI's Privacy Policy.
6. Data Export
When you export a diagram as PNG, the file is generated and downloaded directly to your device. We do not retain copies of exported diagrams.
7. Data Security
Since we do not store user data persistently, there is minimal security risk. All diagram processing happens in real-time within your session and is not persisted after your session ends.
8. Children's Privacy
Mermaid Visualizer does not knowingly collect information from children under 13. The service is provided through ChatGPT, which has its own age requirements.
9. Changes to This Policy
We may update this Privacy Policy from time to time. Changes will be posted on this page with an updated revision date.
10. Contact Us
If you have questions about this Privacy Policy, please contact us through our GitHub repository or support channels.