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Interactive laboratory // 55 published
Computer Science & Tech Simulations — Free Interactive
Free interactive CS and technology simulations: algorithms, data structures, machine learning, cryptography, networking, and more. Learn by doing.
Technology
AI Playground – Explore Machine Intelligence
Experiment with core AI concepts hands-on in this interactive AI playground. Adjust parameters, observe model behavior, and build intuition for artificial intelligence fundamentals.
Technology
BFS vs DFS Simulator: Watch Graph Search Live
Interactive BFS vs DFS simulator. Watch breadth-first and depth-first search explore a graph step by step, with the queue and stack shown as they run.
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Big-O Complexity Visualizer: Compare O(1) to O(n!) on One Chart
Compare constant, logarithmic, linear, quadratic, exponential, and factorial growth on an interactive Big-O chart. Change input size and predict which complexity class grows faster.
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Binary Counter Simulator: Watch Numbers in Binary
Interactive binary counter. Watch an animated counter tick up in binary, see each bit flip and its place value, and read the decimal equivalent live.
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Binary Heap Visualizer: Priority Queue, Sift-Up & Sift-Down
Build a binary min-heap and watch push bubble up and extract-min sift down, with the tree and its backing array shown together. See why a heap gives O(log n) priority-queue operations.
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Binary Search Algorithm Simulator, Visualized
Interactive binary search simulator: watch LOW, MID, and HIGH pointers halve a sorted array each step and see why it runs in O(log n) comparisons.
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Binary Search Tree Visualizer: Insert, Search, Balanced vs Skewed
Watch values walk down a binary search tree on insert and search, and see why sorted inserts degenerate into an O(n) chain while shuffled inserts stay O(log n). Predict the search path yourself at each node.
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Blockchain Simulator – Learn How Blocks Chain
Visualize how blockchain works: create blocks, link them with cryptographic hashes, and see what happens when a record is tampered with. Great for students learning distributed ledger technology.
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Bloom Filter Simulator: Hash Bits & False Positives
Interactive Bloom filter simulator: add items, watch k hash functions flip bits, and compare measured vs. theoretical false-positive rates in real time.
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Buffer Overflow Simulator — Race Arrival Against Processing
Watch a finite buffer fill when data arrives faster than it can be processed, and drop packets when it's full — the exact failure that crashed the first ARPANET message in 1969.
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Cloud Computing Explorer – Virtual Infrastructure
Understand cloud computing architecture by simulating virtual machines, load balancers, and auto-scaling. See how cloud services distribute workloads across servers in real time.
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Computer Graphics Lab – Rendering & Transforms
Explore computer graphics concepts: apply 2D/3D transformations, experiment with lighting models, and see how rasterization converts geometry into pixels on screen.
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Computer Science Fundamentals – Core CS Concepts
Explore the building blocks of computer science: algorithms, data representation, logic gates, and computation models. Interactive visualizations make abstract CS theory tangible.
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Computer Vision Simulator – Image Processing & AI
Learn how computers see: apply edge detection, feature extraction, and object recognition to real images. See the filters and convolutions that power modern computer vision systems.
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Conway's Game of Life Simulator (Interactive)
Interactive Conway's Game of Life. Draw cells or load gliders and blinkers, then press play and watch emergent patterns evolve from four simple rules.
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Cryptanalysis Tool – Break Ciphers with Math
Practice cryptanalysis by attacking substitution ciphers, running frequency analysis, and decoding encoded messages. Understand how classical encryption schemes are mathematically broken.
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Cryptography Simulator – Encrypt & Decrypt Messages
Learn how cryptography protects data: simulate symmetric encryption, public-key cryptography, and digital signatures. See how keys and algorithms transform plaintext into secure ciphertext.
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Cybersecurity Lab – Threats, Defenses & Network Security
Explore cybersecurity concepts: simulate network attacks, configure firewalls, and practice identifying vulnerabilities. Build practical intuition for protecting systems and data.
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Data Mining Explorer – Patterns in Large Datasets
Discover hidden patterns in data with interactive data mining techniques: clustering, classification, and association rule learning. See how algorithms extract actionable knowledge from raw datasets.
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Data Structures Visualizer – Arrays, Trees & Graphs
Visualize how data structures work: insert, delete, and search in arrays, linked lists, stacks, queues, binary trees, and hash tables. Perfect for CS students mastering core data organization.
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Database Index Visualizer – B-Trees & Query Speed
See how database indexes speed up queries: visualize B-tree indexes, compare indexed vs full-table scans, and understand how indexes affect insert, update, and delete performance.
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Database Systems Explorer – SQL, Joins & Transactions
Learn how relational database systems manage data: run SQL queries, visualize join operations, and see how ACID transactions maintain consistency under concurrent access.
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Dijkstra's Algorithm Visualizer: Shortest Paths on a Weighted Graph
Watch Dijkstra settle the closest node, relax its edges, and build a shortest-path tree on a weighted graph. See why a priority queue beats scanning, and predict which node gets settled next.
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Edit Distance Visualizer: Dynamic Programming Table You Fill Yourself
Watch the Levenshtein DP table fill cell by cell with live dependency arrows, trace the optimal alignment path, and test yourself by computing cells from their neighbors.
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Floating Point Error Explained: Why 0.1+0.2 != 0.3
Interactive floating point simulator showing why 0.1 + 0.2 is not 0.3 in binary. Watch fractions expand bit by bit, spot repeating loops, and shrink rounding error.
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Hash Collision Simulator & the Birthday Paradox
Interactive hash collision simulator. Add items to hash buckets and watch collisions appear far sooner than intuition expects — the birthday paradox in action.
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Hash Table Visualizer: Chaining vs Linear Probing & Load Factor
Place keys into hash-table buckets and compare separate chaining with linear probing. Change the load factor, predict collisions, and observe how each strategy resolves them.
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How DNS Works — Interactive DNS Resolution Simulator
Watch a domain name resolve step by step through the DNS hierarchy: recursive resolver, root server, TLD server, and authoritative name server — plus the effect of caching.
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HTTP Request & Response — Interactive Simulator
Send GET, POST, PUT, and DELETE requests and read the raw HTTP response: status codes (200, 404, 301, 500), headers, and body. See how the web works.
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Huffman Coding Simulator: How Compression Works
Interactive Huffman coding simulator. Build a Huffman tree from letter frequencies and see the optimal variable-length codes that make data compression work.
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Logic Gates Simulator: AND, OR, XOR, NAND Explained
Interactive logic gates simulator: flip inputs A and B to watch AND, OR, XOR and NAND outputs light up in real time and build the truth table live.
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Machine Learning Visualizer – Train Models Interactively
Train and evaluate machine learning models interactively: visualize gradient descent, adjust hyperparameters, and see how supervised learning algorithms fit data in real time.
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Mechatronics Simulator – Sensors, Actuators & Control
Simulate mechatronic systems combining mechanical, electrical, and software components: program sensors and actuators, tune PID controllers, and design feedback control loops.
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N-Queens Visualizer: Backtracking Search You Can Watch and Play
Watch backtracking place and undo queens row by row with attacked squares shaded live, then solve the board yourself. See why pruning turns an exponential search into a few thousand nodes.
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Network Congestion Simulator — Why Delay Explodes Near Full Load
See how average queueing delay follows 1/(1−ρ) and shoots toward infinity as offered load approaches a link's capacity — the congestion cliff, plotted and animated.
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NLP Explorer – Natural Language Processing Concepts
Explore natural language processing techniques: tokenize text, analyze sentiment, parse syntax trees, and see how machines understand human language step by step.
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OSI Model Explained — Interactive Packet Encapsulation
See data get encapsulated layer by layer through the OSI model — Application to Physical — with each header added and the PDU renamed from Data to Segment to Packet to Frame to Bits.
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Packet Switching vs Circuit Switching Simulator — Why the Internet Shares Wires
See why the internet chops messages into packets instead of reserving a line. Compare circuit switching and packet switching, watch link utilization, and find the congestion cliff with statistical multiplexing.
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Pathfinding Visualizer – A*, Dijkstra & Graph Search
Visualize pathfinding algorithms like A*, Dijkstra's, and BFS on customizable grids. Draw walls, place start and end points, and watch the algorithm explore the shortest route.
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Ping & Traceroute Simulator — See Latency and Network Hops
Run ping to measure round-trip time and traceroute to reveal every router between you and a host — with TTL, per-hop latency, and min/avg/max RTT.
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Quantum Computing Simulator – Qubits & Quantum Gates
Explore quantum computing with an interactive qubit simulator: apply quantum gates, visualize superposition and entanglement, and run simple quantum circuits step by step.
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Recursion Tree Visualizer: Fibonacci, Naive vs Memoized
Watch the Fibonacci call tree explode under naive recursion, then collapse with memoization. Click any node to light up every place that subproblem is recomputed, and see the call count fall from exponential to linear.
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Reinforcement Learning Lab – Agents, Rewards & Policies
Train a reinforcement learning agent interactively: set up environments, define reward functions, and watch the agent learn an optimal policy through trial and error.
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Sliding Window Visualizer: Max Subarray Sum, Brute Force vs O(n)
Compare brute-force O(n·k) re-summing with an O(n) sliding-window method. Move the window, inspect entering and leaving values, and measure the reduction in operations.
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Sorting Algorithms Visualizer: Bubble & Insertion Sort
Watch bubble sort and insertion sort race as animated bars swap in real time. Interactive sorting algorithm visualizer with comparison and swap counters.
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Stack vs Queue Visualizer: LIFO and FIFO Side by Side
Push the same values into a stack and a queue at once and watch LIFO vs FIFO make their outputs diverge. Click the top or front to remove nodes; the lab enforces each structure's one-end access rule.
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Statistical Multiplexing Simulator — Fit More Users on One Link
See why packet switching serves several times more users than circuit switching on the same link. Set capacity, per-user rate, and activity, and watch the multiplexing gain and overflow probability.
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Store-and-Forward & Pipelining Simulator — Why 3 Hops Aren't 3× Slower
See why a router must fully receive a packet before forwarding it, and how pipelining many packets across hops collapses total time from hops × packets to hops + packets − 1.
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Subnetting Calculator — Free Online IPv4 Subnet Tool
Free subnetting calculator — enter an IPv4 address and CIDR prefix to instantly see subnet mask, network/broadcast address, usable host range, and binary breakdown.
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Sudoku Solver Visualizer: Watch Backtracking Fill the Grid
Watch a backtracking algorithm solve Sudoku cell by cell, placing digits and undoing dead ends, or solve it yourself with live row/column/box conflict detection. See why pruning beats brute force.
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TCP 3-Way Handshake — Interactive Connection Simulator
Watch a TCP connection open with SYN, SYN-ACK, and ACK, exchange data, and close with FIN/ACK — including sequence numbers and each side's TCP state.
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TCP Packet Visualizer – Network Protocols & Handshakes
Trace TCP packets through a network: visualize the three-way handshake, inspect packet headers, and see how TCP ensures reliable, ordered delivery of data over the internet.
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Trie Visualizer: Prefix Tree, Autocomplete & O(L) Lookup
Build a trie and watch words share prefixes; search walks one node per letter, and autocomplete lights up every word beneath a prefix. See why lookup is O(L), independent of dictionary size.
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Two Pointers Visualizer: Two Sum, Brute Force vs Optimized
Interactive Two Sum visualizer: compare brute force, two pointers, and hash map side by side. Watch L and R pointers glide with a live sum readout and see the operation count fall as you pick a better approach.
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Union-Find Visualizer: Disjoint Sets, Union by Rank & Path Compression
Click nodes to union sets and watch find() walk to the root. See how naive union builds an O(n) chain while union-by-rank and path compression flatten the forest toward near-constant inverse-Ackermann cost.
55 published simulations
Free interactive CS and technology simulations: algorithms, data structures, machine learning, cryptography, networking, and more. Learn by doing.