A browser extension that brings 229 curated prompt templates in 12 languages directly into Google NotebookLM's Studio panels and chat input — without leaving the page.
🚀 Install · 📖 How to Use · ✍️ Write Templates · ☕ Buy Me a Coffee
Browse & filter 229 prompt templates in the popup
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Template dropdown injected into the Audio Overview dialog
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Clean popup UI with format rail, search, and filters
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Works seamlessly inside NotebookLM Studio
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| Feature | Details | |
|---|---|---|
| 🎯 | Studio Integration | Injects template dropdowns into Audio, Video, Slides, Infographic, Configure Chat, Flashcards, Quiz, Report, and Data Table panels |
| 💬 | Chat Templates | Adds a compact template selector above the NotebookLM chat input |
| 📚 | 229 Templates | 114 English + 115 Hungarian prompts across 10+ categories |
| 🌍 | 12 Languages | Interface and full template library — titles, descriptions and prompt bodies |
| 🌙 | Auto Dark/Light Mode | Completely adapts to OS theme — no manual toggle needed |
| ✏️ | Custom Prompts | Create, edit, and delete your own prompt templates |
| 📋 | Copy to Clipboard | One-click copy of any prompt |
| ✍️ | Placeholder Filler | Templates with [SLOTS] show a fill-in form — Studio generates in one shot and can't ask you |
| ℹ️ | About Panel | Developer info, GitHub, and Buy Me a Coffee links |
Official Listing: Available on the Chrome Web Store
git clone https://github.com/arlinamid/notebooklm-browser-plugin.git
cd notebooklm-browser-pluginOr download the latest ZIP release and extract it.
node scripts/build-templates.jsGenerates
data/templates.jsonfrom the Markdown template files.
- Open
chrome://extensions/ - Enable Developer Mode (toggle in the top-right corner)
- Click "Load unpacked"
- Select the project root folder (
notebooklm-browser-plugin/)
Navigate to notebooklm.google.com — the extension is now active. Click the ⭐ icon in the Chrome toolbar to open the popup.
- Open the popup by clicking the extension icon in the Chrome toolbar
- Pick a format from the left-hand rail (Audio · Video · Slides · Configure · Cards · Quiz · Report · Table · Chat · Chains). Hover or pin it open to see labels and live result counts
- Filter by category using the chip buttons (Studio, Professional, Learning, etc.)
- Search by typing in the search bar
- Click Apply to paste the prompt directly into the active NotebookLM panel
- Click Copy to copy the prompt text to your clipboard
When you open a Studio panel in NotebookLM (e.g., "Customize Audio Overview"):
- A "Prompt Template" dropdown appears above the text area
- Select any template from the dropdown
- The template text is instantly loaded into the textarea
- Edit as needed, then click Generate
Use the language picker (globe icon) in the popup header. All UI labels and template content update instantly across the 12 supported languages.
- Click the + button in the popup header
- Fill in the Title, Format, Category, Level, and Prompt text
- Click Save — your prompt appears at the top of the list
- Edit or delete custom prompts with the ✏️ and 🗑️ buttons
| Category | Description | Example Templates |
|---|---|---|
| 🎙️ Audio | Podcast-style narration | Deep Dive, Debate, Simple Explainer |
| 🎬 Video | Visual explainer formats | Concept Vulgarisation, Innovation, Onboarding |
| 📊 Slides | Presentation structures | Pitch Deck, Training Slides |
| 🖼️ Infographic | Data visualisation | Visual Summary, Stats Overview |
| ⚙️ Configure | Chat personas / roles | Socratic Tutor, Exam Coach, Research Scientist, Creative Writer |
| 🃏 Cards | Flashcard generation | Focused Study Set, Exam Prep |
| ❓ Quiz | Knowledge testing | Multiple Choice, Open-Ended |
| 📄 Report | Structured documents | Executive Briefing, Blog Post, Competitive Intelligence |
| 📋 Table | Structured data extraction | Research Findings, Key Quotes, Comparative Analysis |
| 💬 Chat | General Q&A / productivity | Text chat prompts, productivity helpers |
Templates are plain Markdown files with YAML frontmatter stored in templates/en/ or templates/hu/.
---
name: "Your Template Title"
category: studio # studio | professional | learning | critical-analysis | troubleshooting | productivity | viral
difficulty: intermediate # beginner | intermediate | advanced
format: audio-overview # audio-overview | video-overview | slide-deck | infographic | configure-chat | flashcards | quiz | report | data-table | text-chat
use_case: "One-line description shown in the popup"
source: Library
---## Prompt
```text
Your prompt goes here.
Use [PLACEHOLDERS] for variable parts the user should fill in.
Structure your prompt clearly with numbered steps or sections.
```Every prompt must tell NotebookLM to take its content from the sources. Without it — especially in a pure visual-style template — the model reads your prompt body as the brief and produces something about the prompt instead of about your material.
Open the prompt with a short grounding block:
GROUNDING — read this first:
Use my selected sources as the only subject matter. Every claim, figure, name and example must
come from them; add nothing from outside knowledge and invent nothing.
Everything below this line describes ONLY the visual style and structure of the output. It is not
the topic — never present, explain or refer to the style guide itself.
If your prompt has [FILL IN] slots, also state what should happen when one is left unfilled —
otherwise the model asks you to fill it in, or copies the bracket text into the output.
node scripts/lint-templates.js enforces both rules.
Create the same file under templates/hu/ with the same filename but translated name: and prompt text. The build script will automatically pick it up.
node scripts/build-templates.js
# Then reload the extension: chrome://extensions/ → 🔄notebooklm-browser-plugin/
├── manifest.json # Chrome Manifest V3
├── icons/ # 16 · 48 · 128px extension icons
│
├── popup/
│ ├── popup.html # Popup UI
│ ├── popup.css # Dark + light theme styles
│ └── popup.js # Popup logic — filter, search, edit
│
├── content/
│ ├── content.js # Content script — injects into NotebookLM
│ └── content.css # Injected element styles
│
├── data/
│ ├── templates.json # Auto-generated template library
│ └── i18n.js # EN + HU UI strings
│
├── templates/
│ ├── en/ # English Markdown templates
│ └── hu/ # Hungarian Markdown templates
│
├── scripts/
│ └── build-templates.js # Template parser & JSON builder
│
├── docs/
│ ├── banner.png
│ └── screenshots/
│
├── CHANGELOG.md
├── LICENSE
└── README.md
- ⛓ Chains never got past their first step — the runner asked for the composer's submit button in the one-second window where NotebookLM had not yet restored it
- 🌐 Language picker, About and New Prompt tooltips were hardcoded English in every language
- 📐 Collapsible format rail — icon column that opens on hover/focus or pins open; replaces the cramped horizontal tab strip
- Two-column card grid and sticky filters — only the results scroll
- Live per-format result counts on the rail
- 🌐 Globe icon beside the language picker
- ⛓ Prompt chains — several prompts sent into the same chat in order, each building on the answers before it. Steps can be existing prompts or one-offs; variables are filled once before the run.
- 🇭🇺 Chains showed English prompts and variable names on non-English interfaces
- 🇭🇺 17 Hungarian templates still carried English placeholder tokens
- 🌐 Switching language on the NotebookLM page reverted to English for every language except Hungarian
- 🈳 Five UI strings added in v1.4.1 were missing from all ten translated locales — they would have shown as "undefined"
- 🛡️ Missing translations now fall back to English instead of breaking the interface
- 💾 Custom prompts beyond the fourth were silently lost — the sync quota was hit and the failure swallowed. Now ~40 sync cleanly, and nothing is ever lost even when sync fills up.
- 🙈 Hide built-in templates you have replaced with your own version
- 📐 Wider popup, 520 → 720 px
- 🌍 Ten new languages — Spanish, Brazilian Portuguese, French, German, Italian, Japanese, Korean, Simplified Chinese, Hindi and Russian, alongside English and Hungarian
- 📝 Prompt bodies are translated too, not just labels — a prompt you cannot read is one you cannot adapt
- 🈁 Language picker in the popup header, languages shown under their own names
- 🐛 The injected UI used to crash outright in any language beyond EN/HU
- 🎯 Apply from the popup went to the chat box regardless of format — an Audio Overview brief or a Configure Chat persona all landed in chat. Apply now opens the panel that matches the prompt and writes into its field.
- 🔤 Card previews show the prompt again instead of the grounding boilerplate
- ℹ️ The About panel showed "Version 1.0" since the first release — it now reads the real version from the manifest
- 🚨 Fixes the "Gemini Notebook" migration — NotebookLM moved to
notebook.google.com, which left the extension completely inactive. Both domains are now supported. - 🛠️ Rewritten Studio detection for the rebuilt dialogs:
configurable-form-dialog,report-customization-dialog, andconfigure-notebook-settings - 🎬 Video Overview, Reports (both paths), and Configure Chat inject correctly again
- ⚡ Mutation observer throttled to one scan per frame — no more constant re-scanning on the new UI
- 📝 Popup Apply now targets an open Studio dialog when one is present
- ✍️ Placeholder filler panel — Studio generates in one shot and never asks, so unfilled
[SLOTS]used to be sent to the model as-is. Templates with slots now show a small fill-in form before you hit Generate. - 🎯 All 229 templates are now source-grounded — 48% of them previously never mentioned the sources, so NotebookLM answered the prompt instead of your material. The visual-style templates (slides, infographics, video) were the worst offenders.
- 💾 Your saved prompts carry over untouched. They live in extension storage, not in the website, so the domain move does not affect them. A migration bug that could discard synced prompts was also fixed.
ℹ️ Studio panels only exist in notebooks you own — shared and featured notebooks have no Studio, so no dropdown is injected there.
- 🎨 6 new Infographic visual style templates (EN + HU): Expressive Cubist Abstract, Geometric Mosaic, Mixed-Media Expressionist, Hybrid Conceptual Collage, Dark Neo-Noir, Brutalist Editorial
- 📖 HU: Manga Comic infographic — 4 variants (classic B&W, shōnen action, editorial, chibi)
- ✨ Expanded slide-deck & visual-style prompts (8 styles, EN + HU): single-line descriptions replaced with detailed YAML design specs (color palettes, typography, layout variations, design rules)
- 📊 Template count: 217 → 229
- ✨ Cross-Device Sync: Saved prompts and language settings are now synchronized across all devices via Chrome sync storage.
- 🔄 Data Migration: Automatic migration of locally saved prompts to the cloud on first run.
- 🛠️ Refactored Selectors: Language-agnostic selectors for all Studio cards (Audio, Video, Slides, Quiz, etc.) and chat customization.
- 🐛 Fixed malformed inline SVG in the floating Buy Me a Coffee widget, replacing it with the official BMC image logo to resolve console parsing errors
- ✨ Replaced the external BMC script widget with a native DOM injection to completely bypass NotebookLM's strict Content Security Policy (CSP)
- ✅ 216 prompt templates (108 EN + 108 HU)
- ✅ Studio panel injection for all 10 NotebookLM formats
- ✅ Custom prompt CRUD
- ✅ Auto dark/light mode
- ✅ EN / HU bilingual interface
- ✅ Build tooling with CRLF normalization and
##-safe extraction - ✅ About panel with developer info
See CHANGELOG.md for the full list of changes.
# Rebuild templates after adding/editing .md files
node scripts/build-templates.js
# Check every template is source-grounded (exits non-zero on problems)
node scripts/lint-templates.js
# Reload extension
# chrome://extensions/ → click 🔄 on the Prompt Architect cardDebugging content script: Open DevTools on notebooklm.google.com → Console → filter by [PA]
Pull requests and issues are welcome! Ideas:
- New prompt templates in EN or HU
- Additional language translations
- Firefox / Edge compatibility
- Bug reports and UX improvements
If this extension saves you time, consider buying me a coffee!
János Rózsavölgyi
@arlinamid · Hungary 🇭🇺
MIT © 2026 János Rózsavölgyi
Not affiliated with or endorsed by Google LLC. NotebookLM is a trademark of Google LLC.