Path 1About 30 minutes
Foundations
Best for: New to data structures
Build a mental model for contiguous memory, LIFO, FIFO, and linked nodes.
- 1. Array
- 2. Stack
- 3. Queue
- 4. Singly Linked List
Interactive algorithm learning
See algorithms change, one decision at a time.
Build real intuition for data structures, algorithms, and interview patterns by predicting, stepping, and experimenting.
Free. No account required. Learn at your own pace.
- interactive visualizers
- 46
- interview patterns
- 6
- code languages
- 3
- sign-up friction
- Zero
Choose your route
Learning paths with a clear next step
Start with the path that matches your goal. Each lesson remains open for exploration.
Path 2About 35 minutes
Sorting and searching
Best for: Preparing for coursework
See how comparisons, movement, and ordering change search strategy.
- 1. Bubble Sort
- 2. Insertion Sort
- 3. Merge Sort
- 4. Binary & Linear Search
Path 3About 50 minutes
Interview patterns
Best for: Practicing coding interviews
Learn reusable decisions before memorizing individual solutions.
- 1. Sliding Window
- 2. Two Pointers
- 3. Fast & Slow Pointers
- 4. Top K Elements
Full library
Find the concept you need
Every visualizer is grouped by the mental model it helps you build.
FoundationsCore structures and the links that connect them.8
Sorting and searchingCompare ordering strategies and ways to find values.11
Trees and graphsExplore hierarchy, traversal, networks, and connectivity.9
Advanced algorithmsWork through optimization, greedy choices, backtracking, and strings.12
Interview patternsMaster reusable patterns through guided problem families.6
Built for active learning
Predict. Step. Explain. Repeat.
The goal is not more animation. It is a clearer connection between each decision, the data it changes, and the code that caused it.
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