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Turn any PDF or slide deck into a true or false quiz

Upload your lecture notes, textbook chapters or photos of pages. DeckOwl writes true or false statements from your material, each with an explanation of why it is right or wrong.

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Drop files here or browsePDF, DOCX, PPTX, text or photos of your notes · several files with Plus

Free · First set needs no signup · Creates quizzes in seconds

How a true or false quiz maker helps you check what you really know

Quick true or false checks catch the ideas you only half remember. A true or false quiz maker built on your own notes pulls the statements straight from the pages you need to learn, so you are not guessing what your instructor might ask.

Works from PDFs, slides, DOCX files, notes and photographed pages
Every statement includes an explanation of the correct answer
Study in the browser on the free plan with three generations per month
Plus and Pro plans add exports for PDF, DOCX, Anki, CSV, QTI 2.1 and Moodle XML

Example cell biology true or false questions

True or false: Mitochondria are the main site of ATP production in eukaryotic cells.True. Oxidative phosphorylation in the inner mitochondrial membrane generates most of the cell's ATP.

True or false: Prokaryotic cells have a membrane-bound nucleus.False. Prokaryotes lack a membrane-bound nucleus, so their DNA sits in an area called the nucleoid.

True or false: In osmosis, water moves across a membrane toward the side with higher solute concentration.True. Water follows its concentration gradient, moving toward the side where water is less concentrated and solutes are more concentrated.

True or false: Ribosomes are surrounded by a lipid bilayer.False. Ribosomes are not membrane-bound; they are built from rRNA and protein.

True or false: DNA replication is semiconservative.True. Each new double helix keeps one original strand and gains one newly synthesized strand.

Generate the full set

Statements from your own material

Upload a PDF, DOCX, PPTX, plain text file or a photo of a page. The questions come from what you actually studied, not generic content.

Explanations for every answer

Each true or false item includes a short explanation, so a wrong answer teaches you the correct idea instead of just marking it wrong.

Study it or export it

Take the quiz in your browser on the free plan. Plus adds PDF and DOCX export, and Pro adds QTI 2.1 and Moodle XML for learning management systems.

How it works

Upload your material

Add slides, a chapter, typed notes or a photo of a handout. Text recognition reads the images.

Choose true or false

Select true or false as the question type, and set how many statements you want from the material.

Review and study

Read each statement and its explanation, retake the quiz until the answers stick, and export it if your plan includes that.

Good statements are specific and testable. Instead of asking whether a topic is important, a useful item names a mechanism, a date or a relationship and asks whether it holds. Tricky statements that swap one term for a related one are especially good practice, because they expose the difference between two ideas you might mix up.

The explanation matters as much as the answer. After each item, read the reason it is true or false, then write the correct version in your own words. Repeat the quiz in a few days to see which statements you still miss.

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Frequently asked questions

How do I write true or false statements that test real understanding?

Use statements that name a specific process, value or relationship, and avoid absolute words like always or never unless they are accurate. Mix true statements with false ones that swap one term for a close but different concept. Read each explanation to see exactly why it holds.

Why are explanations useful on true or false questions?

A true or false answer alone gives you only one bit of information, so the explanation supplies the reasoning you need to remember. Reading why a statement is false often fixes the misconception behind the mistake.

Can I export my true or false quiz on the free plan?

No, exports are a paid feature, and the free plan lets you study the quiz in your browser. Plus includes PDF and DOCX export along with Anki and CSV.

Which plan includes QTI and Moodle XML export?

The Pro plan at $14.99 per month includes QTI 2.1 and Moodle XML export, along with a stronger AI model and bulk upload. Students can get 40% off with a school email.

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Keep exploring the topic

Review the main ideas visually or practice recalling them.