Privacy Policy

Last updated: September 2026

No data collection

Mermaid Theme is a fully client-side application. All Mermaid parsing, canvas rendering, and image exporting happen locally in your browser. Your diagram code, rendered images, and settings are never transmitted to our servers.

Local storage

The site uses your browser’s local storage to remember your preferences (theme selection, visual effect settings, export options, and your current diagram code) so they persist between visits. This data stays on your device and can be cleared at any time via your browser settings.

Analytics

If analytics are enabled on the production site, we use Google Analytics to collect anonymous usage statistics (page views, approximate region, device type). No diagram content or personal data is included.

Third-party services

The site is served via Cloudflare Pages. Cloudflare may process standard server logs (IP address, user agent) as part of content delivery.

Contact

If you have questions about this privacy policy, please open an issue on the project’s repository.