Privacy Policy

Last updated: June 5, 2026

Mermaid Editor ("Mermaid Editor", "we", "us", or "our") provides an online Mermaid diagram editor at mermaideditor.org. This Privacy Policy explains how we collect, use, disclose, and protect information when you use the website, editor, templates, account features, AI editing features, payments, and support channels.

Information We Collect

We may collect information you provide directly, including your name, email address, account credentials, billing details, support messages, diagram prompts, Mermaid source code submitted to AI features, and other content you choose to send to the service.

We may also collect technical and usage information, including IP address, browser type, device information, pages visited, editor actions, error logs, referral URLs, cookie identifiers, and approximate location derived from network data.

Payment information is processed by third-party payment providers. We do not intentionally store full payment card numbers on our servers.

How We Use Information

We use information to provide and improve Mermaid Editor, authenticate accounts, operate AI editing features, process payments, deliver templates and exports, respond to support requests, prevent abuse, debug errors, secure the service, and comply with legal obligations.

When you use AI features, your instruction, Mermaid code, selected diagram context, render status, and related messages may be sent to an AI provider or compatible gateway to generate a response. Do not submit confidential, regulated, or sensitive personal information unless you have the right to do so.

Cookies and Similar Technologies

We may use cookies, local storage, and similar technologies for authentication, preferences, security, analytics, and product operation. You can adjust browser settings to block cookies, but some account or editor features may not work correctly.

Sharing and Service Providers

We do not sell your personal information. We may share information with service providers that help us operate the service, including hosting providers, database providers, authentication providers, AI providers, email providers, payment processors, storage providers, analytics tools, and security vendors.

We may disclose information if required by law, to protect rights and safety, to investigate abuse, or in connection with a merger, acquisition, financing, or sale of assets.

Data Retention

We keep information for as long as needed to provide the service, maintain accounts, comply with legal obligations, resolve disputes, enforce agreements, prevent abuse, and support legitimate business operations. You may request deletion of account information, subject to legal and operational retention requirements.

Your Choices and Rights

Depending on your location, you may have rights to access, correct, delete, export, restrict, or object to certain processing of your personal information. You can contact us to exercise these rights. We may need to verify your identity before completing a request.

Security

We use reasonable technical and organizational measures to protect information. No internet service can guarantee absolute security, and you are responsible for keeping your account credentials secure.

Children's Privacy

Mermaid Editor is not directed to children under 13, and we do not knowingly collect personal information from children under 13.

International Use

Your information may be processed in countries other than your country of residence. By using Mermaid Editor, you understand that information may be transferred and processed internationally.

Changes to This Policy

We may update this Privacy Policy from time to time. The updated version will be posted on this page with a revised "Last updated" date.

Contact

For privacy questions or requests, contact us at support@mermaideditor.org.