NotebookLM

Fast Facts

• What it is: An AI research tool and “thinking partner” that analyzes your sources to create summaries, Q&A, outlines, timelines, briefs, and more.
• Supported sources: Google Docs, Google Slides, PDFs, text/Markdown, web URLs, YouTube URLs (public), audio files, and pasted text.
• Source limits: Up to 50 sources per notebook; each source up to 500,000 words or 200 MB.
• Mobile apps: Official Android & iOS apps with on-the-go Q&A, offline playback of Audio Overviews, and share-to-NotebookLM.
• Signature formats: Audio Overviews (AI-hosted talk-show style summaries) and Video Overviews (Studio panel for visual explainers).
• Account limits (free): ~100 notebooks, 50 sources/notebook, 50 daily chat queries, 3 audio and 3 video generations per day; Plus/Pro raises these (see Pricing).

Similar Tools

• Perplexity Pages — Research → polished, shareable pages.
• Notion Q&A / Notion AI — Workspace-grounded answers inside Notion.
• Gemini in Docs/Slides — Native Workspace drafting and assistance.

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