---

What is alg0.dev

A free, interactive web tool to learn algorithms through animated step-by-step visualizations. Every algorithm includes:

• Animated visualization — watch how the data structure transforms at each step
• Active line highlighting — code highlights in sync with the animation
• Variable tracking — see the state of every variable in real time
• Contextual explanation — understand the why behind each operation

40+ algorithms across 8 categories

Sorting Bubble Sort · Selection Sort · Insertion Sort · Quick Sort · Merge Sort · Heap Sort · Counting Sort · Radix Sort · Shell Sort	Data Structures Stack · Queue · Linked List · Hash Table · Binary Search Tree · Heap	Graphs BFS · DFS · Dijkstra · Prim · Topological Sort	Searching Binary Search · Linear Search · Jump Search · Interpolation Search
Dynamic Programming Fibonacci · 0/1 Knapsack · LCS (Longest Common Subsequence)	Backtracking N-Queens · Sudoku Solver · Maze Pathfinding	Divide & Conquer Tower of Hanoi	Concepts Big O · Recursion · Two Pointers · Sliding Window · Memoization · Greedy vs DP · Space Complexity

Keyboard shortcuts

Key	Action
Space	Play / Pause
→	Next step
←	Previous step
C	Code tab
E	Explanation tab

Plus: speed control (5 levels), skip to start/end, and resizable panels.

Features

• Interactive — step through execution, adjust speed, go forward and backward
• Bilingual — available in English and Spanish
• Responsive — works on mobile, tablet and desktop
• Accessible — keyboard navigation, screen reader support, respects prefers-reduced-motion
• Built-in code editor — Monaco Editor with syntax highlighting and custom dark theme
• No sign-up — open your browser and start learning

Stack

Built with Astro + React + Tailwind CSS + Monaco Editor.

License

MIT — created by @midudev