Privacy Policy

ToneShift - AI Tone Rewriter · Last updated: March 18, 2026

      TL;DR: ToneShift has no server. Your API keys and text never leave your device except to go directly to the AI provider you choose (OpenAI or Anthropic). We collect zero data.
    

1. What Data We Collect

None. ToneShift does not collect, store, transmit, or process any personal data on any external server. We have no server, no database, and no analytics.

2. How the Extension Works

ToneShift operates entirely within your browser:

API Keys: Your API keys are encrypted using AES-GCM and stored locally in your browser's extension storage (chrome.storage.local). They never leave your device.
Text Processing: When you use ToneShift to rewrite text, the selected text is sent directly from your browser to the AI provider you have configured (OpenAI or Anthropic). It does not pass through any ToneShift server.
Usage Statistics: A simple count of rewrites per month is stored locally on your device for your reference only. This data is never transmitted anywhere.

3. Third-Party Services

ToneShift integrates with AI providers that you choose and configure yourself:

OpenAI (Privacy Policy) — Used when you select OpenAI as your provider
Anthropic (Privacy Policy) — Used when you select Anthropic as your provider

Your text is sent to these providers using your own API key under your own account and their terms of service. ToneShift has no access to your account with these providers.

4. Data Storage

All data is stored locally on your device:

Encrypted API keys (chrome.storage.local)
Your preferences (default provider, model selection)
Monthly rewrite count

No data is synced across devices, even if you use Chrome Sync. All storage is local-only.

5. Permissions Explained

contextMenus: To add ToneShift to the right-click menu
storage: To save your encrypted API keys and preferences locally
activeTab: To read selected text and replace it with the rewritten version on the current tab
scripting: To ensure the content script is available on the current page for text replacement
Host permissions (api.openai.com, api.anthropic.com): To send API requests directly from your browser to the AI providers

6. Children's Privacy

ToneShift is not directed at children under 13. We do not knowingly collect information from children.

7. Changes to This Policy

If we update this privacy policy, we will update the "Last updated" date above. Significant changes will be communicated through the extension's update notes on the Chrome Web Store.

8. Contact

If you have any questions about this privacy policy, please contact us by opening an issue on our GitHub repository or emailing us at the address listed on the Chrome Web Store.