Last Updated: February 22, 2026

Mastermind ("we", "us", or "our") operates the Mastermind Chrome Extension.

This Privacy Policy explains how information is handled when you use the extension.

1. Information We Collect

We do not collect personally identifiable information (PII).

• 100% Local Processing: All audio files (WAV, MP3, etc.) are processed strictly locally within your browser using the Web Audio API and Web Workers.
• No Remote Data Collection: We do not upload, save, or transmit your audio files, metadata, user preferences, or usage data to any servers. Everything stays on your local device.

2. Permissions Justification

This extension operates utilizing standard web technologies and requires absolutely no special Chrome permissions to function. It opens in a new tab to provide a dedicated workspace for your audio mastering tasks.

3. Data Sharing and Selling

We do not sell, trade, rent, or transfer user data to third parties.

Because we do not collect personal data, there is no personal data to share.

4. Third-Party Services

We do not use third-party analytics, ad networks, or remote tracking services for this extension.

If you click optional external links inside the extension (if shown), those websites are governed by their own privacy policies.

5. Data Retention and Control

Since Mastermind does not collect or transmit any data, there is no data retention on our end. All output files are generated locally and downloaded directly to your device via your browser's standard download mechanism.

6. Changes to This Privacy Policy

We may update this Privacy Policy from time to time.