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Privacy Policy

Last updated: January 10, 2026

Introduction

SparkChart ("we", "our", or "us") is committed to protecting your privacy. This Privacy Policy explains how our Chrome Extension operates and confirms that we do not collect, store, or transmit your personal data.

Core Privacy Principle

We do not collect any user data.

Your diagrams, code, and prompts are processed entirely locally on your device or via Chrome's built-in AI (Gemini Nano), which also operates locally.

Data Collection & Usage

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No Personal Information

We do not collect names, email addresses, or any other personally identifiable information.

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No Tracking

We do not use cookies, analytics, or tracking scripts to monitor your usage of the extension.

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No External Servers

SparkChart operates offline using bundled libraries (Monaco Editor, Mermaid.js, PlantUML renderers) and standard browser APIs. We do not transmit your content to any external server.

Permissions We Use

  • activeTab

    To allow you to generate diagrams based on the content of the tab you are currently viewing, strictly upon your request.

  • sidePanel

    To open the editor interface in the browser's side panel.

  • scripting

    To extract text from the active page only when you click the "Read Page" button.

  • storage

    To save your preferences (theme, last used diagram type) locally in your browser.

Contact Us

If you have any questions about this Privacy Policy, please contact us via our website or support channel.