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AI flashcards with spaced repetition, generated from any source

Lumo AI turns any lecture, PDF, or video into a deck of AI flashcards built for spaced repetition and active recall — in under fifteen seconds. The same source also becomes notes, a quiz, and a two-host audio overview.

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What you get

  • Spaced-repetition flashcards built for active recall, generated automatically from your source.
  • Cards drawn from lectures, PDFs, papers, articles, videos, or pasted text.
  • Pair them with an adaptive quiz, structured notes, and an audio overview from the same source.
  • Difficulty calibrated to your grade level, from Class 5 to University.

How it works

  1. 1

    Add your source

    Paste a YouTube or article link, upload a PDF, or paste text into Lumo AI's command bar — no sign-up needed for the public demo.

  2. 2

    Pick a format

    Choose from nine study formats: notes, flashcards, a quiz, a mind map, slides, a two-host audio overview, an infographic, a simplified explainer, or a study guide.

  3. 3

    Generate and study

    Lumo AI's five-agent system reads the source and streams a faithful, citation-anchored study format in under fifteen seconds.

Questions

How does Lumo AI generate flashcards?
Lumo AI reads your source, identifies the key concepts, and writes question-and-answer flashcards designed for spaced repetition — automatically, in under fifteen seconds.
Are the flashcards good for spaced repetition?
Yes. The cards are structured for active recall and spaced-repetition review, so you can drill them over time to move concepts into long-term memory.
Can I make flashcards from a PDF or video?
Yes. Upload a PDF or paste a video or YouTube link and Lumo AI generates a flashcard deck from it, alongside eight other study formats.

See it for yourself — no sign-up needed for the public demo.

Open the public demo →
AI Flashcard Generator — Spaced-Repetition Cards from Any Source | Lumo AI