Terms of Service

Last updated: September 2, 2026

Welcome to mermaid.design (“the site”). By using the site, you agree to these Terms of Service.

The Service

The site provides a free, browser-based Mermaid diagram editor with SVG and ASCII rendering, themes, and image export. The service is provided “as is” and “as available”, without warranties of any kind, express or implied.

Your Content

All diagram code and rendered images are created and processed locally in your browser. You retain full ownership of everything you create with the site. We claim no rights over your content.

Acceptable Use

You agree not to:

• Use the site for any unlawful purpose
• Attempt to disrupt or interfere with the site’s operation
• Misrepresent the site or its output in violation of applicable law

Intellectual Property

The site’s design, code, and branding are the property of the site operator. Diagrams are rendered using the open-source Mermaid library, which is licensed under the MIT License.

Limitation of Liability

To the maximum extent permitted by law, we are not liable for any indirect, incidental, or consequential damages arising from your use of the site, including any loss of data stored in your browser.

Changes to These Terms

We may update these Terms from time to time. Continued use of the site after changes are posted constitutes acceptance of the updated Terms.

Contact

If you have questions about these Terms, contact us at [email protected].