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Turn your notes into an editable mind map online

Upload a PDF, DOCX, slides, or notes and get a mind map you can rearrange, expand, and explore branch by branch.

Create mind maps nowFree · No credit card required

Free · First set needs no signup · Creates mind maps in seconds

Why a mind map helps before an exam

Many students start with a stack of lecture slides and no clear picture of how the topics connect. Using a tool to prepare a mind map online lets you turn those notes into a branching outline that shows the relationships between concepts at a glance.

  • Turns lecture slides and long notes into a visual outline
  • Shows how concepts connect, not just a list of terms
  • Editable, so you can correct or add branches as you learn
  • Works in the browser on the free plan
Example cell biology mind map branches
Cell membranePhospholipid bilayer · Selective permeability · Embedded proteins
NucleusNuclear envelope · Chromatin · Nucleolus
MitochondriaSite of cellular respiration · ATP production · Own circular DNA
Endoplasmic reticulumRough ER makes proteins · Smooth ER makes lipids · Detoxifies drugs
Golgi apparatusModifies and sorts proteins · Packages vesicles · Ships to membrane or secretion
Generate the full set

Starts from your own material

Upload PDFs, Word or PowerPoint files, plain notes, or photos of pages. Text in images is read with text recognition.

Fully editable

Rename branches, move ideas between sections, and add your own sub-points so the map matches how you think about the topic.

Explorable structure

Collapse and expand branches to focus on one section at a time, which makes it easier to review before an exam.

How it works

Upload your material

Add a PDF, DOCX, PPTX, text file, or photo of a page. No credit card is needed to begin.

Generate the map

DeckOwl organizes the main ideas into a branching mind map with central topic, main branches, and sub-points.

Edit and explore

Adjust any branch, then study the map in your browser. Paid plans add exports for PDF and DOCX.

A good study map keeps the central topic in the middle, places the major themes on main branches, and uses short phrases for the details. Because the structure is editable, you can reorganize it as your understanding improves instead of starting over.

Once the map is ready, use it as a checklist. Click into each branch, explain it from memory, and then check your answer against the source material.

Explore related topics

Frequently asked questions

How do I organize a mind map for a biology exam?

Start with a central topic such as cell structure, then add one main branch for each major organelle or process. Keep each sub-point to a few words so the map stays easy to scan.

How detailed should the main branches be?

Keep main branches to the core themes of the unit, and place specific terms and definitions underneath them. If a branch becomes crowded, split it into two related branches.

Can I export my mind map?

Exporting is a paid feature. Plus includes PDF and DOCX exports, and Pro adds QTI 2.1 and Moodle XML, while the free plan keeps your maps for browser study.

Is it free to start?

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

Generate free mind maps

Keep exploring the topic

Review the main ideas visually or practice recalling them.