NotebookLM Source Manager

Easily manage your NotebookLM sources.

■ Still deleting NotebookLM sources one at a time? NotebookLM has no way to delete sources in bulk. Cleaning up means repeating "⋮" → "Delete source" → "Delete" for every single item. With 50 sources, that is 150 clicks. This extension turns that into: tick the boxes, press once. ■ What it does 1. BULK DELETE Your sources are listed with checkboxes. Select any number of them and delete them together. Select-all is supported, so emptying a notebook takes seconds. Progress is shown as the deletion runs. 2. NARROW DOWN FIRST ・Filter titles by keyword (regular expressions supported) ・Filter by source type (PDF / web / YouTube / document / Markdown and more) ・Sort by title Useful for "remove only the PDFs" or "keep just the ones matching this term". 3. DUPLICATE CHECK Finds sources that share the same title, so you can clean up material that was imported more than once. 4. BATCH RENAME Rename many sources at once using "old title,new title" lines, CSV style. 5. BATCH ADD YOUTUBE URLS Paste YouTube links one per line and add them all as sources. Short links (youtu.be) and URLs carrying extra parameters are normalized automatically. 6. CSV EXPORT Export the currently listed sources with their titles and types. ■ How to use 1. Open a notebook in NotebookLM 2. Click the extension icon in your toolbar 3. Select sources in the window that opens and run the action Every mode includes a built-in "How to use" panel, so you can get started without reading any documentation. ■ Privacy ・Everything runs locally in your browser ・Source titles and contents are never sent anywhere ・The extension only touches pages on notebooklm.google.com ・It does not access your account credentials or passwords The source code is public on GitHub: https://github.com/ambit1977/notebooklm_source_manager ■ Please note ・Deletion cannot be undone. Review your selection before running it. ・This extension works by operating the NotebookLM interface, so changes on Google's side can temporarily break it. Updates follow when that happens — please report problems via GitHub Issues. ・This extension is not provided by, or affiliated with, Google LLC. ■ What's new in v1.2.42 Updated for the July 2026 NotebookLM (Gemini Notebook) interface redesign. ・Fixed the extension not working at all for accounts served on notebook.google.com (NotebookLM is served on two different domains depending on the account) ・Fixed adding sources, which had stopped working entirely ・Fixed the source list showing nothing (when the source panel is collapsed, or sources are grouped by label) ・Fixed source names appearing blank ・Fixed source type detection ・Improved handling of the delete confirmation dialog ・Fixed Markdown files added from Google Drive being shown as Docs instead of MD Usability improvements: ・Every mode now includes a built-in "How to use" panel (collapsible) ・When sources cannot be loaded, the reason and what to do are shown on screen ・Tabs that were already open are reconnected automatically right after the extension is installed or updated