Computer Mini Universe Start with curiosity and discover a bigger world 中

Explore & Tools

Useful tools, playful experiments and a wonderful digital world.
Play, learn and discover something new!

Play a little. Discover a lot!
Music BoxPlay notes and hear how frequencies become music.Try it now Binary Character ExplorerLight up the bulbs to explore how binary represents various characters, including Chinese, Japanese, Korean and more.Try it now Typing PracticeA fun online typing game for kids to practise keyboard skills and improve typing speed and accuracy.Try it now

Stay curious. There is always more to explore!

More learning tools and upcoming experiments

Learning Tools

File Encoding ViewerUpload text files to compare ASCII, hexadecimal, and binary encoding.Try it now Pixel ExplorerZoom in to see pixel details of images.Coming soon File Size CalculatorCalculate file size conversions between different units.Try it now

Coding Tools

C++ Step-by-Step RunnerStep through C++ code and observe the execution process.Coming soon Variable VisualizerVisualize variable changes during program execution.Coming soon Array VisualizerVisualize array structure and operations.Coming soon Call Stack VisualizerVisualize the execution process of function call stack.Coming soon Recursion VisualizerVisualize the execution process of recursive functions.Coming soon Complexity ExplorerAnalyze time and space complexity of algorithms.Coming soon

Computer Lab

Virtual Computer TeardownVirtually teardown a computer and learn about internal components.Coming soon Build a ComputerLearn how to assemble a computer.Coming soon CPU Instruction SimulatorSimulate CPU instruction execution process.Coming soon Program Loading SimulatorSimulate the process of loading programs into memory.Coming soon Packet Travel SimulatorSimulate the transmission of data packets in the network.Coming soon DNS Lookup SimulatorSimulate the DNS lookup process.Coming soon How a Web Page LoadsSimulate the complete process of loading a web page.Coming soon Train a Simple AITrain a simple artificial intelligence model.Coming soon

Algorithm Visualizer

Bubble SortVisualize the execution process of bubble sort algorithm.Coming soon Selection SortVisualize the execution process of selection sort algorithm.Coming soon Insertion SortVisualize the execution process of insertion sort algorithm.Coming soon Linear SearchVisualize the execution process of linear search algorithm.Coming soon Binary SearchVisualize the execution process of binary search algorithm.Coming soon Depth-First SearchVisualize the execution process of depth-first search algorithm.Coming soon Breadth-First SearchVisualize the execution process of breadth-first search algorithm.Coming soon Maze SolverSolve maze problems using different algorithms.Coming soon Prefix SumVisualize the application of prefix sum algorithm.Coming soon Complexity ComparisonCompare time complexity of different algorithms.Coming soon

Fun Challenges

Robot CommandsControl robot movement through programming.Coming soon Predict the OutputPredict the output of code.Coming soon Find the BugFind errors in the code.Coming soon Binary ChallengeBinary calculation challenge.Coming soon Variable Tracing ChallengeTrack variable changes during program execution.Coming soon Array ChallengeArray operation challenge.Coming soon Recursion ChallengeRecursion algorithm challenge.Coming soon Maze ChallengeMaze pathfinding challenge.Coming soon Olympiad Thinking ChallengesInformatics Olympiad thinking challenges.Coming soon