Interactive Algorithm Visualiser

See Sorting Come Alive

Watch 10 classic sorting algorithms unfold in real time. Compare performance, trace pseudocode, and build deep intuition — one frame at a time.

▶ Launch Visualiser ⊞ Explore Algorithms
sortandvisualize.com / visualiser
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Algorithms
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Visual States
10 Algorithms

Every major sorting
algorithm, visualised

From O(n²) classics to hybrid powerhouses — explore them all with step-by-step animation, real-time complexity analysis, and live pseudocode execution.

Features

Built for deep understanding

Every detail is designed to make complex algorithms approachable and memorable.

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Real-time Animation
Smooth frame-by-frame animation at 10 speed levels. Watch every comparison and swap happen before your eyes with colour-coded visual states.
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Live Pseudocode
The active line of pseudocode highlights as the algorithm runs — directly linking the visual to the logic, step by step.
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Live Complexity Stats
Track comparisons, swaps, and elapsed time as the sort runs. See O(n²) vs O(n log n) cost in real data, not just theory.
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Audio Feedback
Each bar movement generates a tone proportional to its value. Sorting sounds surprisingly musical — and makes patterns even more perceptible.
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Step-by-step Mode
Pause and advance one frame at a time using the step button or arrow keys. Perfect for understanding tricky moments in complex algorithms.
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Comparison Table
View all 10 algorithms side-by-side: best/average/worst-case time, space complexity, stability, and method — to make informed choices.
How It Works

Three steps to intuition

No setup. No install. Just open and start exploring.

01
Choose an Algorithm
Pick from 10 classic sorting algorithms in the left panel. Each shows time complexity, space complexity, and stability at a glance.
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Configure & Shuffle
Set the array size (10–120 elements) and animation speed (×1 to ×10). Generate a fresh random array whenever you want.
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Watch & Learn
Hit Sort and watch the algorithm work. Pause, step, or compare — the pseudocode panel follows along with every operation.
Why Sort & Visualize

The best way to learn sorting algorithms

Understanding sorting algorithms is fundamental to computer science education. Whether you're preparing for technical interviews at Google, Amazon, or Meta, studying for university exams, or simply curious about how computers organise data, Sort & Visualize gives you the visual intuition that textbooks cannot.

Our interactive visualiser lets you watch every comparison, swap, and recursive call happen in real time. Combined with live pseudocode highlighting, complexity counters, and audio feedback, you develop a deep, intuitive understanding of algorithm behaviour that goes far beyond memorising Big-O notation.

Sort & Visualize is used by students, educators, and self-taught programmers in over 50 countries. It's completely free, requires no account, and works in any modern browser. Start exploring sorting algorithms today.

Ready to see sorting click?

No login, no install. Open the visualiser and start in seconds.

▶ Launch Sort & Visualize