Gemini Notebook Toolkit vs ExtendLM
Comparing Gemini Notebook Toolkit and ExtendLM, two Chrome extensions for Gemini Notebook (formerly NotebookLM). ExtendLM can record microphone or tab audio as a source; Gemini Notebook Toolkit focuses on capturing AI chats and web pages into a searchable library you can export.
Our Verdict
Depends on what you add to notebooks
ExtendLM is an established Gemini Notebook extension (about 30,000 Chrome Web Store users, 4.7 stars as of September 2026) and can record microphone or tab audio as a source. Gemini Notebook Toolkit is the better fit if most of your sources are AI chat threads and web pages that you want to keep in a searchable library and export as Markdown, LaTeX, JSON or plain text.
Why choose Gemini Notebook Toolkit
- Captures ChatGPT, Claude, Gemini, Perplexity and Grok conversations as clean text sources
- Private, searchable library of everything you capture, outside Gemini Notebook
- Bulk import from open tabs, a pasted URL list or a CSV (Pro)
- Export as Markdown, LaTeX, JSON or plain text
- Interface in 16 languages
Why people choose ExtendLM
- About 30,000 Chrome Web Store users with a 4.7-star rating (September 2026)
- Records microphone or tab audio as a notebook source
- Organization features for managing notebooks
Frequently Asked Questions
Is Gemini Notebook Toolkit an ExtendLM alternative?
Yes, for capture and export workflows. Both are third-party Chrome extensions for Gemini Notebook (formerly NotebookLM). Gemini Notebook Toolkit is strongest at capturing AI chats and web pages into a searchable library and exporting them. ExtendLM offers audio recording as a source, which Gemini Notebook Toolkit does not.
Do I still need a folders extension after Google added Collections?
Google began rolling out Collections for grouping notebooks on 20 July 2026, which covers basic organization natively. Extensions are still useful for things Gemini Notebook does not do itself, such as capturing AI chats, bulk import and exporting sources.
Can I record a lecture as a source?
ExtendLM can record microphone or tab audio. Since 15 September 2026 the Gemini Notebook mobile app also has its own audio recorder for lectures. Gemini Notebook Toolkit does not record audio.
Do these extensions change Gemini Notebook's usage limits?
No. Extensions cannot change Google's usage limits. They help you get material in, keep it organized, and get it back out.
Try Gemini Notebook Toolkit Free
Import sources from 10+ platforms into Gemini Notebook with one click.