Terms of service
Using the service
Mermaid Viewer is a free, browser-based tool for rendering Mermaid diagram syntax. You may use it for personal or commercial work. By using the site you agree to these terms.
Your content
Your diagrams are yours. Because rendering happens locally in your browser, we never receive a copy of your code. Share links contain the diagram data within the URL itself — you are responsible for who you share links with.
Acceptable use
- Do not use the service to create content that is unlawful or infringes others' rights.
- Do not attempt to disrupt the site or automate excessive request volumes.
- Share links are content-addressed data, not hosted pages — do not use them to distribute malicious or illegal material.
No warranty
The service is provided "as is", without warranty of any kind. Diagram rendering depends on your browser; export results may vary between devices. Do not rely on this tool as your only copy of important diagrams — keep your source code in version control.
Limitation of liability
To the maximum extent permitted by law, we are not liable for any indirect, incidental or consequential damages arising from use of the service, including loss of data stored in your browser.
Trademarks
Mermaid is a trademark of its respective owner. Mermaid Viewer is an independent tool and is not affiliated with, endorsed by, or sponsored by the Mermaid.js project.
Changes
We may update these terms; the date above reflects the current version.