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Compare Notebooks

Compare Notebooks puts two Gemini Notebook (formerly NotebookLM) notebooks side by side. You see the sources they share in green and the sources only one has. Then you can add the missing ones, sync them or merge them.

This needs Kortex Pro. See pricing.

Two notebooks compared side by side

Why compare notebooks?​

It is like laying two shopping lists next to each other. You see at once what is on both and what is missing from one.

How to compare​

  1. Click Compare in the sidebar. Or tick two notebooks in All Notebooks and click Compare in the bar.
  2. Pick two notebooks.
  3. Click Compare Selected.

What you see​

  • For each notebook: how many sources, tags and collections it has.
  • Sources both notebooks have are in green.
  • A button for each notebook says how many sources it is missing, for example Add 6 missing source(s) to this notebook.
  • Tags and collections side by side. It says Tags in sync when they match.

What you can do​

  • Sync All: make the two notebooks match.
  • Merge into New: put both into a new notebook.
  • Export Diff: save the differences.
  • Change Selection: choose another pair.
Good to know
  • Sync All changes the notebooks, so look at the two sides before you click it.

Can I sync tags and collections too?​

Yes. Besides Sync All, the page has Sync tags and Sync collections. Merge into New puts both notebooks into a new one, and Export Diff saves the differences. Compare needs Kortex Pro, while Merge Notebooks has 3 free merges on the Basic plan.