Privacy Policy

Mermaid Viewer is designed to render diagrams in your browser. We do not require an account and do not ask you to upload diagram source code to use the editor.

We use Google Analytics to understand aggregate usage, such as page views and feature interactions, so we can improve reliability and usability. Google may set cookies or process device information according to its own policies.

We may display Google AdSense advertising on eligible content pages. AdSense may use cookies or similar technologies to personalize or measure ads, subject to Google’s policies and your available consent choices.

Do not paste passwords, API keys, personal data, or other confidential information into the editor. To ask about this policy, contact us.

Last updated: August 29, 2026