Orbind

Turn your PDF into a quiz.

Upload your lecture slides, a chapter or your notes as a PDF. Orbind writes graded practice questions from it, with an explanation for every answer, and short lessons that teach it first.

Try for $0

Free, no card. Lesson 1 in about a minute.

Join 500+ students learning with Orbind

A 42-page PDF of slides becomes graded multiple-choice questions, each with an explanation: which organelle makes most of the cell's ATP? The mitochondrion.

42 pages become 8 short lessons.

The lessons teach the PDF first, simplest idea first, so the quiz is not the first time you meet them.

42 pages8 lessons3 min each, simplest first
  1. StartLesson 1 · 3 minDemand
  2. Lesson 2 · 3 minQuantity demandedbuilds on Demand
  3. Lesson 3 · 3 minSupplybuilds on Demand
  4. Lesson 4 · 3 minEquilibriumbuilds on Supply and demand
  5. Checkpoint+ 4 more lessons

What you miss comes back before you forget it.

A wrong quiz answer becomes a flashcard. Each right answer sends it a little further out.

More sellers bring more coffee to market. The price…

Goes down

  1. TodayMissed
  2. TomorrowRight
  3. In 6 daysRight
  4. In 2 weeksRight

Why it works

Testing yourself beats rereading.

Every question is a test, not a reading.

Remembered one week later:
  • Read it 4 times40%
  • Read it once, tested 3 times61%

Roediger & Karpicke, 2006, Psychological Science

Questions

Before you upload.

PowerPoint, scans, size, languages, price.

  • Can AI make a quiz from a PDF?

    Yes. Upload the PDF to Orbind and it writes multiple-choice questions from what is in it, each with four options and an explanation, graded as you answer. It writes only from your PDF, not from the open web.

  • What happens after I sign up?

    You drop in the PDF. About a minute later lesson 1 is ready and the quiz can be made from the same material. No prompts, no card-making, no setup.

  • Can I use PowerPoint slides?

    Save or export the slides as a PDF first (File > Save as > PDF in PowerPoint, Keynote or Google Slides), then upload the PDF. PowerPoint files themselves are not read yet.

  • What about a scanned PDF?

    A scanned PDF has no text to read, so it is turned away. Take photos of the pages instead: photos of slides, a textbook or the board are read as images.

  • How big can the PDF be?

    Up to 25 MB and 500 pages. The free plan reads up to about 25,000 words from one PDF, Pro up to about 100,000. Lecture slides are usually far below both.

  • How many questions does it make?

    Quizzes come in levels: up to 10 questions a level on the free plan and 30 on Pro. The lessons have their own 8 to 12 questions each, across the whole lecture.

  • Is it free?

    Your first subject is free with no card: one PDF, the whole learning path, one quiz, one flashcard deck and one exam brief. Pro ($20/mo) is for students with several classes.

  • Does it work in other languages?

    Yes. The questions are written in the language of your PDF. The app's buttons and menus are in English.

Start here

Try it with the PDF you have.

Upload it, play lesson 1, make the quiz. About a minute to read, three minutes a lesson. Free, no card.

Try for $0