Which YouTube summarizer is free?

Glasp (free, with highlights/notes), Summarize.tech (free, chapter-style long-form summaries), and NoteGPT (free tier with daily limits) are repeatedly named free options in 2026 roundups. Most also offer paid tiers for longer videos or export.

Which tool gives chapters / timestamps?

Eightify gives key points with timestamps; Summarize.tech returns section-based chapter summaries good for long lectures/talks. NoteGPT and others provide structured bullet summaries.

Which is best for deeper research across sources?

NotebookLM treats the video as a source inside a research workspace and lets you ask questions across it plus other docs; Gemini can analyze a YouTube URL with timestamps. These go beyond one-paragraph summaries.

Are YouTube summaries accurate?

They depend on the video's transcript and can miss context or misstate points. For medical, financial, legal, or technical content, always check the original video before relying on the summary.

YouTube chapter / summary tool

A task + requirement decision guide — not another "best YouTube summarizer" roundup. Choose based on what you need the video tool to do.

Task: get chapters, summaries, and notes from a YouTube video.

chapterstimestampsnotesflashcardsfreemultilingual

1 · OutputChapters / bullets / notes / flashcards

2 · Free tierUsable without paying

3 · MultilingualSummarize non-English video

4 · Research depthOne video vs across sources

5 · ExportNotion / MD / library

6 · PrivacyCloud processing

Decision matrix (observed capabilities)

Cells reflect public claims / SERP observation (2026-10). yes = supported, no = not supported, unverified = claim exists but we have not tested.

Tool	Chapters / timestamps	Notes / flashcards	Free	Multilingual	Research depth	Evidence note
Glasp	transcript summary	highlights/notes	yes	partial	personal library	Free; highlights + summary + export (2026)
NoteGPT	structured	notes/flashcards/quizzes	free tier	yes	library	Studying focus; multilingual (2026)
Summarize.tech	chapter-style	paragraph	yes	partial	one video	Free; long-form chapter summaries (2026)
Eightify	timestamps	key points	limited	partial	one video	Quick key points + timestamps
NotebookLM	source analysis	citations	yes	partial	across sources	Video as source in research workspace
Gemini	timestamps	analysis	plan	yes	URL + questions	Analyze YouTube URL, timestamps

Verdict — pick by your requirement

Free + notes/highlights: Glasp — creates transcript summaries, highlights key points, and exports to Notion.
Studying (flashcards/notes): NoteGPT — offers summaries, mind maps, flashcards, quizzes, and multilingual support.
Long-form chapter summaries: Summarize.tech — organizes content by section and handles hour-long talks.
Deeper research across sources: NotebookLM / Gemini — provides source-grounded Q&A.

Evidence (SERP-observed, 2026-10)

geekchamp.com/9-best-youtube-video-summarizer-free-in-2026 — Lists Glasp, NoteGPT, Summarize.tech, and HIX AI as free options.
aitoolscoutai.com/best-ai-tools-to-summarize-youtube-videos-2026/ — Covers Glasp (free + notes), NoteGPT, Summarize.tech (long-form), and Kome (teams).
analyticsinsight.net — Compares Eightify, Glasp, NoteGPT, NotebookLM, Gemini, Summarize.tech, and YouTLDR.

Honesty notes

No tool accuracy percentage on this page comes from our own testing. Third-party claims are clearly marked unverified.
"Best / recommended" here means our editorial match to a stated requirement, not a claim that any external AI system will rank or cite this page.
Summaries rely on the video transcript and may miss context or misrepresent details. For important or technical content, check the original video.
Monthly-search / difficulty / competition figures are not included — they require data from our internal research index.

Machine-readable

Markdown twin Search tools & guides llms.txt OpenAPI