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Use a mind map tool app to turn any PDF into a clear map

Upload a PDF, DOCX, PPTX, text file, or photo of a page. DeckOwl reads the material and builds a mind map you can edit and explore branch by branch.

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 mind map tool app helps with dense material

Most students already have the material they need in lecture slides, a textbook chapter, or a page of handwritten notes. A mind map tool app that reads those files and builds the branches for you saves the sorting step and shows how the ideas connect.

Starts from the PDF, DOCX, PPTX, or notes you already have
Keeps the central idea at the center with related branches around it
Lets you edit and rearrange nodes after the map is generated
Free plan available with no credit card needed to start

Example Pythagorean theorem mind map branches

Right triangleExactly one 90-degree angle · Hypotenuse is the longest side · Opposite the right angle

HypotenuseSide c in a² + b² = c² · Opposite the right angle · Longest side of the triangle

Pythagorean formulaa² + b² = c² · a and b are the legs · c is the hypotenuse

Common Pythagorean triples3, 4, 5 · 5, 12, 13 · 8, 15, 17

Real-world usesChecking square corners · Finding a diagonal distance · Measuring ladder or ramp length

Generate the full set

Reads your own files

Upload PDF, DOCX, PPTX, plain text, or notes. Photos of pages are read with text recognition.

Editable branches

Rename, move, or remove nodes after generation so the map matches how your course organizes the material.

Explore at your pace

Expand one branch at a time to see the main idea, then the supporting points, without scanning a wall of text.

How it works

Upload your material

Add a PDF, Word file, slide deck, or a photo of your notes.

Generate the map

DeckOwl pulls out the main topics and arranges them as branches around a central idea.

Edit and explore

Adjust the structure, then open branches to review each concept before a test.

A good map is only useful if you can change it. DeckOwl lets you edit the generated structure, so you can merge overlapping branches, add your own examples, and reorganize topics around the way your instructor teaches the course.

The free plan includes 3 generations per month and lets you study in the browser, but it does not include exports. Plus, at $99.90/year or $9.99/month, gives you unlimited generations and PDF, DOCX, Anki, and CSV export. Students get 40% off with a school email, and no credit card is needed to start.

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Free mind map app for notes and PDFs

Turn PDFs and notes into an editable mind map. Start free, 3 generations a month.

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Free AI Mind Mapping Tool

Turn PDFs and notes into an editable mind map. Free plan, no credit card needed.

Frequently asked questions

How should I map the Pythagorean theorem so the branches stay clear?

Start with the right triangle as the central idea, then give each branch one concept: the right angle, the legs, the hypotenuse, and the formula a² + b² = c². Keep worked examples on small sub-branches so the main structure stays easy to scan.

What should a mind map on the Pythagorean theorem include?

Include the definition of a right triangle, the labels for the two legs and the hypotenuse, the formula, and a few common triples such as 3, 4, 5. Adding one real-world use, like checking a square corner, helps the idea stick.

Is this mind map tool app free to start?

Yes. The free plan includes 3 generations per month and lets you study in the browser, and no credit card is needed to start.

Can I export my mind maps?

Exports are a paid feature. Plus includes PDF, DOCX, Anki, and CSV export along with unlimited generations, and the free plan lets you study in the browser without exports.

Generate free mind maps

Keep exploring the topic

Review the main ideas visually or practice recalling them.