Frequently Asked Questions

What is Kortex?

Kortex is a browser extension that enhances NotebookLM by adding export functionality, prompt management, and source viewing features. You can export notebook sources in multiple formats (PDF, Markdown, Text, ZIP), save and organize prompts, and create custom source views.

Is Kortex free?

Kortex offers a free Basic tier with 15 exports per month, 15 imports per month, 5 prompts, and 5 source views. For more features, we offer Lite ($3.99/month), Pro ($6.99/month with unlimited everything + Google Docs Sync), and Lifetime Pro (one-time payment for unlimited forever).

Do I need to sign in?

Yes, signing in is required to track your usage, sync your subscription status, access premium features, and sync your saved prompts and views across devices.

Which browsers are supported?

Kortex currently supports Google Chrome, Microsoft Edge (Chromium-based), Brave Browser, and other Chromium-based browsers. Firefox support is coming soon.

What formats can I export to?

You can export to PDF (formatted documents), Markdown (intelligently formatted with hierarchy detection), Text (plain text), and ZIP (compressed archives).

Do exports count against my limit if they fail?

No, failed exports do not count against your monthly limit. Only successful exports are counted.

What is the Prompt Holder?

The Prompt Holder lets you save and organize your NotebookLM prompts. You can create folders, add tags, and quickly access saved prompts. Basic tier includes 5 prompt slots, Lite tier includes 30, and Pro tier has unlimited slots.

What are Source Views?

Source Views allow you to create custom filters for viewing notebook sources — filter by type (PDFs, GDocs, Web, Text, YouTube) and search by name. Basic includes 5 slots, Lite includes 30, Pro has unlimited.

What is Sync All Google Docs?

Sync All Google Docs is a Pro-only feature that syncs all Google Doc sources in a notebook with a single click, ensuring your sources in NotebookLM are always up-to-date.

Can I export chat conversations?

Yes! You can export your NotebookLM chat conversations in Markdown, Text, PDF, or JSON formats. Chat exports count against your monthly export limit, but copying to clipboard is free and unlimited.

What is Highlight & Snipe?

Highlight & Snipe lets you quickly save highlighted text from any webpage to NotebookLM. Select text on any webpage, right-click, and choose "Send highlight to NotebookLM". Snippets do not count against your export limit.

Can I delete sources from my notebooks?

Yes! You can delete sources directly from NotebookLM notebooks using the delete button in the source panel header. This feature is available to Lite and Pro users only.

How do I upgrade?

Click the extension icon, click "Upgrade", select your tier (Lite, Pro, or Lifetime Pro), complete payment, and enjoy immediate access.

What happens if I cancel?

Your subscription remains active until the end of your billing period, then you revert to the Basic tier. Lifetime Pro users never expire. Prepaid credits remain in your account and never expire.

Are there refunds?

We don't offer refunds for subscription payments. However, you can cancel anytime and won't be charged for future billing periods.

Is my data secure?

Yes! Kortex uses Google OAuth for authentication, Firebase for secure backend services, and Firestore for cloud storage. No sensitive data is stored on our servers except usage statistics. All exports are processed locally in your browser.

My account status isn't updating after payment — what do I do?

After completing payment, click the extension icon and sign out, then sign back in. This refreshes your subscription status. If the issue persists, contact support at support@kortex.com.

Does Kortex work offline?

No, Kortex requires an internet connection for authentication, subscription verification, and source data retrieval. Once data is loaded, some features like copying chat conversations to clipboard can work offline.