# Delete Many NotebookLM Sources at Once


The Delete Sources button removes many sources from a Gemini Notebook (formerly NotebookLM) notebook at once. You tick the sources, type `confirm`, and click **Delete Selected**. Deleted sources cannot be brought back.

<img src="/docs/img/docs/shot-ai-sites-delete-sources-modal.webp" alt="The Delete Sources window with a filter, Select All, Select Duplicates and a confirm box" width="560" />

## Why delete sources here?

Gemini Notebook (formerly NotebookLM) deletes sources one at a time. When you have to clear out thirty, that takes long. This button is like a bin you can fill all at once.

## How to delete sources

1. Open a notebook.
1. In the Kortex bar, in the **Sources** group, click the bin icon.
1. A window called **Delete Sources** opens. Tick the sources to remove. Use **Filter sources…** to find them, **Select All** for everything, or **Select Duplicates** to pick repeats.
1. Read the red note: the action is permanent.
1. Type `confirm` in the box. This switches on the red button.
1. Click **Delete Selected**. The number in brackets is how many will go.

:::warning Be careful

Deleted sources cannot be brought back. The AI also stops using them in that notebook. Download them first if you might need them. See [Download sources](/docs/download-all-sources-button).

:::

## Good to know

- This is free on every plan.
- The window closes and the notebook refreshes when it is done.

## How do I delete only sources that failed to load?

Open [All Sources](/docs/all-sources) in the dashboard. When some sources failed to process, a **Delete bad sources** button appears and asks you to confirm.

## Can I hide this button?

No. Every other Kortex bar button can be turned off in the side panel's **Manage features**, but **Delete sources** stays.

Related: [The Kortex notebook bar](/docs/notebook-bar).