NotebookLM
Source-grounded research assistant that turns your documents into briefings and podcasts
About
NotebookLM is Google's AI research assistant, launched as a Google Labs experiment in 2023. Users upload PDFs, docs, slides, YouTube links, and audio files into notebooks; the assistant answers questions with inline citations to the exact source passages, which makes it popular with students and researchers. Its signature feature, Audio Overviews, turns sources into podcast-style discussions between AI hosts (Deep Dive, Brief, Critique, and Debate formats, in 50+ languages per reporting), and Video Overviews arrived in 2025. Standalone iOS and Android apps launched May 19, 2025. It runs on Google's Gemini models and is free to use. Grounding answers in user-supplied sources reduces (but does not eliminate) hallucination risk, and output quality depends heavily on source quality.
What it can do
- Source-grounded Q&A with inline citations, Audio Overviews in multiple podcast formats, Video Overviews from documents, mind maps, timelines, and study guides, support for PDFs, slides, YouTube transcripts, and audio files, public notebook sharing via link
Setup
Sign in with a Google account, create a notebook, and add sources (files, links, YouTube, audio).
Prerequisites
A Google account.
Use cases
Works with
Trust score — 8/10
Scored 8/10 (verified tier, metrics-v1). Evidence: Google Labs origin (2023); source-grounded answers with inline citations.; Audio Overviews in Deep Dive/Brief/Critique/Debate formats, 50+ languages per reporting; Video Overviews added 2025.; Mobile apps launched May 19, 2025; runs on Gemini models; free to use.; Limitation: output quality depends on source quality; grounding reduces but does not eliminate hallucinations..
Sources
Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.