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Turn your JavaScript notes into a concept map

Paste lecture notes or upload a PDF and get an editable, explorable mind map of closures, promises, scope and the rest of your JavaScript course.

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

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How a JavaScript concept map helps you study

Learning JavaScript means tracking how scope, closures, promises and the event loop connect, and a JavaScript concept map shows those links at a glance better than a list of definitions. Paste your lecture notes or upload a PDF and DeckOwl builds a starting map of the main topics and their sub-points.

Shows how closures, scope and hoisting relate to each other
Makes the difference between promises and the event loop easier to see
Lets you rebuild a messy set of notes into one organized structure
Gives you a map to quiz yourself from, branch by branch

Example JavaScript concept map branches

ClosuresA function remembering variables from its outer scope · Lexical scoping decides what a closure can see · Common use in private state and callbacks

Event loopCall stack runs synchronous code · Task queue holds callbacks · Microtasks like promise handlers run before the next task

PromisesPending, fulfilled, and rejected states · then and catch chain results and errors · async and await are syntax over promises

PrototypesObjects link to a prototype · Property lookup walks up the prototype chain · Classes are syntax over prototypes

Hoistingvar declarations are hoisted and start as undefined · let and const are hoisted but stay in the temporal dead zone · Function declarations are fully hoisted

Generate the full set

Map from your own material

Upload PDFs, DOCX or PPTX slides, plain notes, or a photo of a page, and get a map built from what your instructor actually covered.

Edit and reshape

Rename, move, or add branches as your course moves on, such as adding async patterns after synchronous code.

Explore branch by branch

Expand or collapse any topic, like the event loop, so dense material stays readable instead of overwhelming.

How it works

Add your JavaScript notes

Paste text or upload a file from your course, including slides or a photo of handwritten pages.

Generate the map

DeckOwl pulls out the main JavaScript topics and their sub-points and arranges them as a connected map.

Explore and edit

Click through branches, fix anything the AI got wrong, and keep building the map as you learn.

Because the map is editable, you can reshape it as the course moves on. Click into any branch to expand or collapse it, which helps when a single topic like the event loop has more details than you can hold at once.

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Frequently asked questions

How many branches should a JavaScript concept map have?

Most useful maps for a single JavaScript topic have five to eight main branches, such as closures, the event loop, and promises. Split very broad material, like the whole language, into separate maps.

How do I study from a JavaScript concept map effectively?

Cover the sub-points and explain each branch from memory, then check against your notes. Pay attention to the links between branches, since how closures relate to scope matters more than isolated definitions.

Can I edit the map after it is generated?

Yes, the map is editable and explorable, so you can rename, move, or add branches. Exporting to PDF or other formats is available on the paid Plus plan.

Is there a free plan?

The free plan includes 3 generations per month and studying in the browser, with no credit card needed to start. Plus is $39/year or $7.99/month and adds unlimited generations and exports, and students get 40% off with a school email.

Generate free mind maps

Keep exploring the topic

Review the main ideas visually or practice recalling them.