BackWhat Does Grok Know?

Privacy Verification

We claim your data never leaves your browser. Here is how you can verify it yourself.

The Architecture

What Does Grok Know? is a static Next.js application. After the initial page load, all processing happens entirely in your browser:

  • File parsing runs in a Web Worker — a sandboxed browser thread with no network access by default
  • Data storage uses IndexedDB — a browser-native database that stores data on your device only
  • NLP analysis (topics, sentiment, behavioral profiling) runs in a second Web Worker — entirely client-side
  • 3D visualization uses WebGL via Three.js — rendered by your GPU, no server involvement

How to Verify: Network Tab

The most straightforward way to verify that no data is sent to a server:

  1. Open your browser Developer Tools (press F12 or Ctrl+Shift+I)
  2. Go to the Network tab
  3. Clear the existing network log
  4. Now import your Grok JSON file into the app
  5. Watch the Network tab — you will see zero outgoing requests containing your chat data

What you will see: After the initial page load (HTML, JS, CSS assets), the only activity is local. The parsing and analysis happen in Web Workers which do not make network requests. You can even disconnect from the internet after the page loads and the app will continue to work perfectly.

How to Verify: Offline Mode

For absolute certainty:

  1. Load the app in your browser
  2. Disconnect from the internet (turn off WiFi or unplug ethernet)
  3. Import your Grok JSON file
  4. The app will parse, analyze, and visualize your data completely offline

If data were being sent to a server, the import would fail offline. The fact that everything works offline proves the processing is 100% local.

How to Verify: Application Storage

You can inspect exactly where your data is stored:

  1. Open Developer Tools → Application tab
  2. Expand IndexedDB in the sidebar
  3. You will see "GrokBrainDB" with tables for conversations and messages
  4. Click any table to browse data — all stored locally on your device
  5. Check Cookies — you will find none from this app

How to Verify: Source Code

The app is fully open source:

How to Delete Your Data

  • Browser settings: Clear site data for this domain
  • Developer Tools: Application → IndexedDB → right-click "GrokBrainDB" → Delete database
  • In the app: Use "New Import" to replace existing data