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Summarize a video lecture's transcript and quiz yourself on it

Paste a lecture transcript, slides or notes and get a mind map of the main ideas plus practice questions with explanations. Start free with no credit card.

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Summarize a lecture, then test what you kept

A recorded lecture is hard to review because the main points are spread across a long talk. Paste the transcript into this AI video summarizer and quiz generator and it reduces the material to a mind map of its main branches, then builds questions from the same content. The mind map shows the structure and the quiz shows whether you can rebuild it without looking.

Paste a transcript or upload slides, notes, PDFs and DOCX files
Mind maps show the main branches before you memorize details
Multiple-choice, true/false and short answer questions include explanations
PDF, DOCX, Anki and CSV exports need Plus, and QTI and Moodle XML need Pro

Example summarizer practice questions for lectures

What is the difference between a summary and a paraphrase?A summary condenses a whole talk or text into its main ideas, while a paraphrase restates one passage at similar length. Why: a summary removes detail, and a paraphrase keeps it.

True or false: a good lecture summary should copy the speaker's sentences word for word.False. Why: copying keeps the wording but skips the work of deciding what matters, so recall stays weak.

What is extractive summarization?Selecting the most important sentences from a source and keeping them unchanged. Why: it stays faithful to the original wording but can read choppily.

What is abstractive summarization?Writing new sentences that capture the source's meaning, the way a student rewrites notes in their own words. Why: it reads more smoothly but can introduce errors unless checked against the source.

What should a summary of a lecture always preserve?The main claims, the evidence that supports them and the conclusion. Why: those three parts carry the argument, so the rest can be cut.

Generate the full set

Main ideas as a mind map

Upload slides, notes or a pasted transcript and get a mind map of the main branches and their sub-points, so you see the structure before you memorize details.

Quizzes from the same material

Multiple-choice, true/false and short answer questions, each with an explanation, so you test what you kept instead of rereading.

Flashcards with spaced repetition

Turn key terms and definitions into flashcards that return on a spacing schedule as you review.

How it works

Add your material

Paste a video transcript or upload a PDF, DOCX, PPTX, notes, or a photo of a page.

Get a mind map and quiz

DeckOwl pulls out the main branches for a mind map and writes questions with explanations.

Study and export

Review in the browser on the free plan. Export to PDF, DOCX, Anki or CSV on Plus, and to QTI 2.1 or Moodle XML on Pro.

DeckOwl works from text, so transcribe the video with whatever tool your school provides and upload the text. Photos of slides are read with text recognition, which helps when a lecturer shares only images.

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Frequently asked questions

Can I upload a video file directly?

DeckOwl works from text, so paste a transcript or upload the notes or slides you already have. Photos of pages are also read with text recognition.

How do I summarize a lecture so the quiz covers the right points?

Check the mind map against your course outline and keep the branches the exam will test. Then work through the quiz questions for those branches and reread any explanation you got wrong.

What makes a good summary for studying?

A useful summary keeps the main claims, the evidence and the conclusion, and drops repeated examples. Compare your version with the original to confirm you did not lose a key term.

Is the free plan enough to try it?

The free plan includes 3 generations per month and studying in the browser, with no credit card needed to start. Unlimited generations and exports need Plus at $39/year or $7.99/month.

Generate free quizzes

Keep exploring the topic

Review the main ideas visually or practice recalling them.