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Turn any PDF into a concept map you can edit

Printable templates rarely match your course. Upload your own PDF, notes, or slides and DeckOwl builds a map of the key ideas and how they connect.

Create mind maps nowFree · No credit card required

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

Free account · 3 sets a month · Creates mind maps in seconds

Why a custom map beats a generic template

A concept map maker PDF tool is most useful when the map comes from the exact readings your instructor assigned, not a blank template you have to fill in yourself.

Starts from your own PDF or notes, so the content matches your course
Editable branches you can rename, move, and reorganize
Explorable layout for seeing how ideas connect across a topic
Works in the browser on the free plan; exports to PDF are on Plus

Example ecosystem and food web concept map branches

Trophic levelsProducers (plants, algae) · Primary consumers (herbivores) · Secondary consumers (carnivores) · Decomposers (fungi, bacteria)

Energy flowRoughly 10% of energy passes to the next trophic level · The rest is lost mostly as heat · Energy flows one way and is not recycled

Nutrient cyclingCarbon moves through photosynthesis and respiration · Bacteria fix nitrogen into forms plants can use · Decomposers return nutrients to the soil

Food chain vs. food webA food chain is one path of energy · A food web links many overlapping chains · Webs show how losing one species affects others

Keystone speciesHas an effect larger than its numbers suggest · Removing it can collapse other populations · Sea otters keep sea urchins from destroying kelp forests

Generate the full set

Starts from your own PDF

Upload a PDF, DOCX, PPTX, or plain text notes. The map is built from your material, not a generic template.

Editable and explorable

Rearrange branches, rename nodes, and expand or collapse sections so the map fits how you think about the topic.

Reads photos too

Snap a picture of a textbook page or handout and text recognition turns it into text the map generator can use.

How it works

Upload your material

Add a PDF, document, slide deck, or pasted notes from your class.

Generate the map

DeckOwl pulls out the main concepts and links them into a branching mind map.

Edit and study

Adjust branches, then explore the map or turn the same material into flashcards and quizzes.

Templates show the shape of a concept map but not the content. When the map is generated from your own pages, the branches reflect the terms, causes, and examples your course actually covers.

Because the map is editable, you can remove what you do not need, add your own connections, and keep the version you will review before an exam.

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Frequently asked questions

What is the difference between a food chain and a food web?

A food chain traces one path of energy from a producer to a top consumer. A food web combines many overlapping chains, which shows how a change in one species can affect several others.

How should I organize a concept map for an ecosystems unit?

Start with the main idea, such as energy flow or nutrient cycling, then add trophic levels, examples, and the processes that link them. Keep each branch to one concept so the connections stay clear.

Can I export my concept map as a PDF?

PDF export is a paid feature included with Plus at $99.90 per year or $9.99 per month. The free plan lets you study generated maps in the browser without exports.

Is there a free way to try the concept map maker?

Yes. The free plan includes 3 generations per month and browser study, and no credit card is needed to start. Students with a school email get 40% off paid plans.

Generate free mind maps

Keep exploring the topic

Review the main ideas visually or practice recalling them.