Last updated: July 22, 2026
The extension stores the following locally in your browser only:
| Data | Purpose |
|---|---|
| AI API Key | Authenticate with OpenAI/Gemini/Claude |
| Transcripts | YouTube captions for analysis |
| Speaker Tags | Per-video speaker assignments |
| Fact-Check Results | AI verdicts and explanations |
| Preferences | Provider, model, theme settings |
All data lives in chrome.storage.local. No data hits our servers. No sync across devices.
Transcript text is sent to your chosen AI provider using your own API key. YouTube captions are fetched directly from googlevideo.com.
Uninstalling the extension deletes everything. You can also clear data via chrome://extensions without uninstalling.