One-Click Notebook
Type a topic. NotebookLM's own research engine finds the sources, you keep the good ones, and a new notebook arrives with its report.
- Fast or deep research
- Failed builds give the run back
Chrome extension · NotebookLM & Gemini Notebook
NotebookLM,fully loaded.
Pull sources in from every AI chat, video and page. Keep hundreds of notebooks searchable and tagged. Turn them into podcasts, decks and automations that run without you.
No account to start. No API keys on any plan.
Sources in1,284
AI-tagged1,201
Studio artifacts312
Podcast minutes846min
One click from
- ChatGPT
- Claude
- Gemini
- Perplexity
- Grok
- YouTube playlists
- X threads
- Any web page
- Page as PDF
- RSS feeds
- CSV of links
- Open tabs
- Readwise
Hero features
Twelve things NotebookLM can't do on its own
Pick one to watch it work. Each shows the plan it's on.
Notebook Audit
Scores every source in a notebook and flags the weak, the duplicated and the off-topic, so you know what is holding answers back.
- Runs in the background with live progress
- Cancel stops the spend at once
Notebook Enrich
Takes the gaps the audit found and fills them with new sources, so coverage climbs where the notebook was thin.
- Only adds what you approve
- Works from the audit's own findings
Notebook autopilot
Build, audit and fill the gaps as one automation, on a schedule or a trigger. The notebook keeps getting better while you are away.
- Enrich steps wait for your approval
- One switch pauses everything
YoPoD playlists
A whole YouTube playlist becomes one merged source, with every video's transcript in order. One source instead of fifty.
- Or one source per video: 3 runs a month on Free
- Runs in the background
Video frames
Captures the slides and diagrams on screen with the full transcript beside them, saved as one PDF source. NotebookLM finally sees what the video shows.
- 3 a month on Free, no limit on Pro
- A failed capture isn't counted
AI tagging
AI tags every source from a short list of tags you own, or leaves it untagged when nothing fits.
- 20 sources a month on Free
- Tag new imports automatically on Pro
Library map
Every notebook, source and topic on one live map, so you can see where your research clusters and where it is thin.
- Lenses for activity, topics, tags and artifacts
- Free on every plan
Notebook report
One page per notebook: its sources and artifacts, its tags, and a knowledge graph of how it all connects.
- Opens from the library or inside NotebookLM
- Every number is from your own data
Connections
Obsidian two-way, with citations that link back to your own notes. Anki decks from flashcards, Readwise highlights in, posts to Slack and Discord.
- Nothing is sent until you confirm a tool once
- Obsidian and Anki stay on your computer
Podcast feed
Publish Audio Overviews as episodes in your own RSS feed that any podcast app can follow.
- 1,000 published minutes on Pro, 5,000 on Pro+
- Unpublishing gives the minutes back
Automations
Pick a trigger and the actions that follow: import, refresh, tag, generate, publish. Start from a ready-made automation.
- 10 triggers, 16 actions
- Risky steps wait for your approval
See it work
One notebook, start to finish
This is NotebookLM with KastorFlow added. Everything in indigo is KastorFlow.
notebook.google.com/notebook/urban-heat-islands
Sources 3
PDFHeat vulnerability index 2025
WCool roofs: a city-scale review
WTree canopy and surface temperature
Chat
Which interventions cut night-time heat most?
Tree canopy and cool roofs lead, with canopy cutting surface temperature by up to 5 °C 2 3.
Studio 0 of 6
Audio Overviewpodcast
Video Overviewvideo
Mind Mapmap
Reportbriefing
Flashcardsstudy
Slide deckslides
Published to your feedUrban heat, episode 4 · 11 min
Side panelREADY●
Library: 41 notebooks · 1,284 sources
Why it exists
NotebookLM reads brilliantly. Everything around it is manual.
Without1 paste
at a time, from forty tabs and three chatbots.
With KastorFlow
Save from where you are
A button inside ChatGPT, Claude, Gemini, Perplexity, Grok, YouTube, X and Reddit. Whole playlists and feeds as background jobs.
Without0 tags
Notebooks pile up on one page, half of them "Untitled".
With KastorFlow
A library you can search
Every notebook, source and artifact in one place, AI-tagged from your list, found with Ctrl+K.
Without1 artifact
clicked, waited for, downloaded, one by one.
With KastorFlow
All of Studio at once
Generate every artifact in one click, download them all, publish audio as a podcast.
WithoutYou
are the scheduler. Nothing runs while you're away.
With KastorFlow
Rules that run for you
Import, refresh, tag, generate and publish on a trigger. The risky steps wait for your approval.
Built for heavy NotebookLM users
Depth, not a single trick
KastorFlow keeps working in the background: jobs survive closing the tab, and limits are counted on the server, never guessed.
5AI chat sites with a save button
10automation triggers
16automation actions
4places it works: in NotebookLM, side panel, dashboard, toolbar
0API keys to paste, on any plan
Plans
Free to start. Pro when you need more.
Every tool shows its plan. Free covers trying KastorFlow and light daily use.
Free
$0forever
No account needed to start
Add to ChromeEverything you need to try KastorFlow and use it lightly every day.
Hero features
- One-Click Notebook5 builds a month
- AI tagging20 sources a month
- Video frames3 captures a month
- Library map and notebook reportsevery notebook
- Save AI chats and links5 chats · 10 links a day
See all 20 tools in Free
Collect
- Paste a link (web page, PDF, one YouTube video) 10 a day
- Save web pages, selected text and Quick Capture
- Screen capture as PDF
- Save posts and threads from X and Reddit
- Save AI chats from ChatGPT, Claude, Gemini, Perplexity and Grok 5 a day
- Add open tabs One at a time
- YouTube: one source per video from a playlist, channel or search 3 runs a month
- Video frames: on-screen frames and full transcript as a PDF 3 a month
Organize
- Library map of every notebook, source, tag and clip
- Search your whole workspace (Ctrl+K)
- Find duplicate sources, notebook source tools
- Folders 10 folders
- Saved prompts (plus 8 starter prompts) 10 of your own
- AI tagging, from your own tag list 20 sources a month
Create and share
- One-Click Notebook: build a research notebook on a topic 5 a month
- Browse, preview and download Studio artifacts
- Download all Studio artifacts at once
- Export notebooks 10 a day
- Notebook report with knowledge graph
Where it works
- Buttons inside NotebookLM, side panel, dashboard, toolbar
Pro
Most tools$3.99$7a month
$47.88 billed yearlyBilled monthly, or $3.99 a month yearly
Get ProEverything in Free without the daily caps, plus:
Hero features
- YoPoD playlistsa whole playlist as one source
- Automations10 triggers · 16 actions
- Podcast feed1,000 published minutes
- AI tagging on arrival150 a month · 50 automatic
- One-Click Notebook, Video framesno monthly limit
See all 25 things Pro adds
Collect
- Paste a link (web page, PDF, one YouTube video) No daily limit
- Save AI chats from ChatGPT, Claude, Gemini, Perplexity and Grok No daily limit
- Add open tabs All at once
- Several links at once, a CSV of links, an RSS feed
- Website crawl (beta)
- YouTube: one source per video from a playlist, channel or search No monthly limit
- YoPoD: a YouTube playlist as one merged source
- Video frames: on-screen frames and full transcript as a PDF No monthly limit
Organize
- Folders No limit
- Saved prompts (plus 8 starter prompts) No limit
- AI tagging, from your own tag list 150 sources a month
- AI tagging of new imports 50 sources a month
- Move or copy sources between notebooks
- Merge notebooks
- More than one NotebookLM account
Create and share
- One-Click Notebook: build a research notebook on a topic No monthly limit
- Curated sources and a cited briefing
- Generate all Studio artifacts in one click
- Revise a single slide
- Export notebooks No daily limit
- Refresh sources
- Podcast and podcast RSS feed 1,000 published minutes
Automate
- Automations: 10 triggers, 16 actions
- Ready-made automations
- Podcast on autopilot, scheduled refresh
Pro+
$4.99$7.99a month
$59.88 billed yearlyBilled monthly, or $4.99 a month yearly
Get Pro+Everything in Pro, plus:
Hero features
- Notebook Auditscore every source
- Notebook Enrichfill the gaps it found
- Notebook autopilotbuild · audit · enrich
- ConnectionsObsidian ⇄ · Anki · Readwise · Slack · Discord
- Podcast feed5,000 published minutes
See all 7 things Pro+ adds
Create and share
- Thorough research depth
- Podcast and podcast RSS feed 5,000 published minutes
- Notebook Audit: score every source, flag weak ones
- Notebook Enrich: fill the gaps the audit found
- Saved source stacks and custom domains
Automate
- Notebook autopilot: build, audit and enrich on a schedule
Connect your tools
- Connections: Obsidian (two-way), Anki, Readwise, Slack, Discord
FAQ
Questions people ask
What is KastorFlow?
KastorFlow is a Chrome extension for Google NotebookLM. It brings sources into your notebooks from AI chats, YouTube and web pages, keeps every notebook and source organized with search and tags, helps you generate, export and publish what you make in NotebookLM, and automates the repetitive parts.
Does KastorFlow work with Gemini Notebook at notebook.google.com?
Yes. KastorFlow works on both notebooklm.google.com and notebook.google.com, the address where Google also serves NotebookLM under the name Gemini Notebook.
Is KastorFlow free?
Yes. KastorFlow is free to install and works without an account. The Free plan includes the library, search, tags, single-link imports, screen capture as PDF, saving AI chats and 5 research notebook builds a month. Pro costs $7 a month or $3.99 a month billed yearly; Pro+ costs $7.99 a month or $4.99 a month billed yearly. See every tool by plan.
Do I need an API key to use the AI features?
No. KastorFlow's AI features run on keys we manage, so there is nothing to set up and no key to paste on any plan.
How do I save a ChatGPT conversation to NotebookLM?
Install KastorFlow, open the conversation in ChatGPT and click the Save to NotebookLM button KastorFlow adds to the page, then pick a notebook. The conversation is added as a source. The same button works in Claude, Gemini, Perplexity and Grok. The Free plan includes 5 chat captures a day.
How do I import a YouTube playlist into NotebookLM?
Paste the playlist link into KastorFlow and choose one source per video, or the whole playlist as one merged source. One source per video is included 3 times a month on Free and without a monthly limit on Pro; the merged playlist source is a Pro tool.
Does KastorFlow see my Google password or store my notebooks?
No. KastorFlow never sees your Google password. Your notebooks stay in your own Google account; KastorFlow keeps a working copy in your browser so it can search and organize them, and it does not collect your browsing history or sell your data.
Is KastorFlow made by Google?
No. KastorFlow is an independent product. It is not made, endorsed or sponsored by Google. NotebookLM and Gemini are trademarks of Google LLC.
Let Kastor do the busywork.
Install in seconds. Your first capture works before you sign in.
