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Best NotebookLM (Gemini Notebook) Chrome extensions in 2026: importers, exporters, tools
Google does not publish a browser extension for NotebookLM, now renamed Gemini Notebook; the help centre covers the web app and the mobile apps and nothing else (support.google.com/gemininotebook, checked 2026-08-21). Every extension below is third-party and works inside the browser session you are already signed into, so the two questions worth asking about each are “what does it get in, or out” and “where does your data go on the way”.
Prices were read from each product’s site or store listing on 2026-08-21; they change often, so treat them as a snapshot.
The list at a glance
| Extension | Gets in / out | Account or backend? | Price when checked | Source published? |
|---|---|---|---|---|
| NotebookLM Web Importer | in: page, tabs, links, YouTube, RSS | sign-in for Premium | Free (20 pages/day) · $19/yr · $39 once | No |
| YouTube to NotebookLM (store listing) | in: YouTube video/playlist/channel | not stated | no price shown | No |
| Gemini Notebook Web Importer (youtube-to-notebooklm.com) | in: YouTube, links, RSS, AI chats; out: ZIP | “no account required” | Free (capped) · $4.99/mo · $19.99/yr · $29.99 once | No |
| NotebookLM Tools | in: URL lists, playlists, RSS, tabs, files; out: JSON/Markdown | Google session only | Free · $7/30 days · $29/yr · $59 once | No |
| Kortex | in: AI chats, social, tabs, RSS, CSV, crawler; out: ZIP | own backend | Free · $45/yr · $99 once | No |
| ExtendLM | in: page, YouTube, audio, chats, papers, tabs; out: exports | own login | not shown when checked | No |
| NotebookLM Ultra Exporter | out only | none; local | Free | source not published |
| NotebookLM ULTRA | in: 25+ sites, YouTube, RSS, tabs; out: 14 formats | server for transcripts, AI, export | Free · $5 · $12 · $18 /mo | No |
| Bookshelf | neither; folders | none; profile sync | Free | No |
| WebSync | in: whole-site crawl, YouTube, email, Drive | optional sign-in | Free · $19/mo · $59/mo | No |
| source-lm | in: JSON datasets, YouTube video/playlist/channel, page | no backend of ours | Free (5 bulk actions/mo) · $29 once | source-available, PolyForm NC |
The extensions
NotebookLM Web Importer
NotebookLM Web Importer imports the current page, open tabs, link lists, YouTube videos and playlists and RSS feeds. The listing says the developer does not collect your data; the site has a sign-in for the Premium licence. Prices on its site, checked 2026-08-21: free for 20 page imports a day, $19 a year, $39 once. Good for: one page at a time at low cost.
YouTube to NotebookLM
Two products carry this name. The store listing YouTube to NotebookLM – YouTube to Gemini Notebook adds videos, playlists, channels and search results to a notebook; it shows no price, no in-app purchase flag and no website link; no privacy disclosure was captured (checked 2026-08-21). The site youtube-to-notebooklm.com instead installs a listing now called Gemini Notebook Web Importer: YouTube, links, RSS, AI chats and source export to ZIP, “no account required”, free with a monthly cap, $4.99 a month, $19.99 a year or $29.99 once (checked 2026-08-21). Good for: YouTube in without paying.
NotebookLM Tools
NotebookLM Tools bulk-adds a pasted URL list, a playlist, an RSS feed or sitemap, all open tabs, Drive sources and file uploads; it also groups notebooks into collections and exports sources to JSON or Markdown. The site says source content does not leave the device. Prices on its pricing page, checked 2026-08-21: free with all features, a $7 30-day Pro pass, $29 a year, $59 once. Good for: the widest set of bulk inputs plus notebook housekeeping.
Kortex
Kortex archives AI chats, imports from X, Reddit and YouTube, and on Pro takes URL lists, open tabs, RSS, CSV files and a crawler; it exports sources to ZIP and adds folders, tags and bulk delete. It has its own backend: the listing says it handles personally identifiable information, and cloud sync is a Pro feature. Prices on its homepage, checked 2026-08-21: free with daily caps, Pro $3.75 a month billed as $45 a year, $99 once. Good for: a broad suite where cloud sync is a feature, not a concern.
ExtendLM
ExtendLM imports the current page as PDF, text or URL, YouTube videos, channels and playlists, tab audio, AI chats, Reddit and X threads, and papers from PubMed, arXiv, OSF and OpenAlex, with folders and tags. The listing says the developer does not collect data, but the site ships login and payment routes, so paid features go through an account. Price: not shown on the listing or the site when checked 2026-08-21. Good for: papers from arXiv and PubMed, price unknown.
NotebookLM Ultra Exporter
NotebookLM Ultra Exporter goes the other way: notes and reports to Markdown, DOCX or PDF, sources downloaded in batch, studio outputs and chat history to files, and a bulk delete for sources. It imports nothing. The site says processing is local with no account. Free, no tiers, checked 2026-08-21; the site calls it open source but the linked repository holds no extension code or licence, so treat the source as unpublished. Good for: getting your work back out.
NotebookLM ULTRA
NotebookLM ULTRA is a different product from the exporter. It bulk-adds from YouTube, Google Scholar, PubMed, arXiv, Reddit, RSS, open tabs and more, merges many items into one source, and exports in 14 formats. Transcripts, AI summaries and export run on its server; the listing says it handles personal information and browsing history. Prices on its site, checked 2026-08-21: free, $5, $12 or $18 a month, no yearly or lifetime shown. Good for: many sources from many sites, merged, if a subscription and a server are fine.
Bookshelf
Bookshelf adds folders and subfolders with drag-and-drop to the dashboard, with search, sort and a JSON export of the layout; it does not import or export sources. Storage is local, synced through Chrome’s profile sync, with opt-out anonymous stats. Free, donations only, checked 2026-08-21. Good for: too many notebooks and no way to group them.
WebSync
WebSync crawls and imports whole websites, including login-protected and dynamic pages, plus YouTube, email and Drive to notebook, and scheduled crawls. The site says it runs locally unless you opt in; sign-in is optional; the listing says it handles personal information. Prices on its pricing page, checked 2026-08-21: Lite free, Starter $19 a month, Pro $59 a month, a $9.90 one-off smart-crawl setup. Good for: a documentation site as sources.
source-lm
source-lm is ours. It takes a JSON dataset such as a Telegram chat export, split into Markdown files packed to a 400,000-word budget under the 500,000-words-per-source limit, with a re-run uploading only the new records; YouTube, through “Add to notebook” buttons on the watch page, the playlist panel, the playlist page and the channel header (latest N videos, 50 by default); and the current page or a pasted link. No backend of ours and no third-party server: it talks to the notebook’s own origin, its upload hosts, and the payment provider for the licence check. The code is source-available under the PolyForm Noncommercial licence, unminified, which is not open source. Free for 5 bulk actions a calendar month (one click adding more than one source is one action); single pages, links and videos are unmetered; $29, once, for unlimited. It does not import PDFs, does not take all open tabs, does not export, and has no folders. Good for: a whole dataset or channel with no cloud in the loop.
Which one
- One page at a time, the odd playlist: NotebookLM Web Importer, or the free tier of NotebookLM Tools.
- YouTube only: either YouTube-to-NotebookLM listing, knowing which one you installed.
- Folders, or sources back out: Bookshelf for folders; NotebookLM Ultra Exporter for export; NotebookLM Tools and Kortex do both in a larger suite.
- A whole website: WebSync.
- A whole dataset or channel, no cloud in the loop: source-lm. See Export a Telegram chat to NotebookLM and YouTube to NotebookLM.
FAQ
Does NotebookLM have a browser extension?
Not from Google. As of 2026-08-21 the help centre documents the web app and the mobile apps only, and no store listing is published by Google. Every extension here, including a listing literally named “NotebookLM”, is third party.
Is there a Chrome extension called NotebookLM Tools?
Yes, listed as “NotebookLM Tools for Gemini Notebook”, from nlmtools.com, with a free tier and paid Pro options. See the entry above.
What is the best extension for NotebookLM?
It depends on the job, which is why the list above is by job, not a ranking: a cheap importer for single pages, a dataset tool for a chat export or a channel, a purpose-built tool for export or folders.
What are some useful add-ons for NotebookLM?
Importers for pages and YouTube, exporters for notes and sources, folder managers, and site crawlers; the table at the top has one or two of each.
Can I export my sources from NotebookLM?
Google’s help pages document no bulk source export (checked 2026-08-21). NotebookLM Ultra Exporter, NotebookLM Tools, Kortex and Gemini Notebook Web Importer add it; Ultra Exporter is the free, export-only one.
Limits of this roundup
- Prices rot. Every number above was read on 2026-08-21. Check the linked page before paying.
- Listings change, and feature lists are the developers’ own. “What it does” is what each listing or site claims; we did not test every import path, and one listing in the YouTube pair has already been renamed once.
- We wrote one entry. source-lm is ours; it gets the same columns as everyone else, and its “does not” list is there on purpose.
Not affiliated with Google. NotebookLM and Gemini are Google trademarks; this is an independent extension that automates a signed-in session.
Get source-lm — single pages and videos are free and unmetered; the free tier adds 5 bulk actions a month.