Welcome to Huo's Coding Lab
We want to hear from you. Your suggestions are very important to us. Thank you. Go to Suggestion Page >> #### 3D Solid Viewer

Viewing 3D solid online. #### ASCII Table Lookup

Ascii Table, Keystroke Recognition. What is the chance that at Least two people at a group has the same birthday? #### Caesar Cipher Encipherer and Decipher

Enciphering and Deciphering Caesar Cipher. Solve Caesar Cipher with Best Guest. #### Cayley Tables Generator

Generate Cayley Tables or Operation Tables online. #### Chinese Remainder Theorem Problem Solver

System of Linear Congruences Solver. #### Clock

Online analog and digital clocks with different styles. #### Coprime Finder

Find all numbers less than (or the closet to) and relatively prime to a given number. #### Countdown Timer

Countdown for a specific interval; Countdown to a specific time. #### Dim Sum Reference Sheet #### Euclidean Algorithm Step by Step Solver

Using Euclidean Algorithm to find the Greatest Common Divisor (GCD) of Two Positive Integers with Step by Step Explanation. #### Factor Pair Finder

Find all factor pairs of an integer. #### Fractal Generator

Generate Koch Curve, Sierpinski Triangle, Mandelbrot Set, and other fractals online. #### GCD and LCM Calculator

Find the greatest common divisor (GCD) and Least Common Multiple (LCM) of a list of integers #### Geometric Transformation Visualizer

Step by step showing how translations, reflections, and rotations work #### Group Assigner

Randomly assign students to different groups. #### Instant Vote

Instantly gathers multiple choice / vote results. #### Integer Partitioner

Find all partitions of a givin positive integer. #### Keyboard Event Tester

Show KeyCodes for KeyDown, KeyUp, and KeyPress Events. #### Letter Frequency Analyser

Cryptanalysis: Frequency Analysis for Simple Substitution Ciphers (such as caesar cipher). #### Logic Expression Evaluator

Evaluating Logic Expression, Generate Truth Table. #### Mandelbrot Set Orbit Tracer

Visualize the Orbits of 0 under x^2 + c #### Matrix Determinant Calculator

Calculate the matrix determinant online #### Maze Generator

Generate playable maze #### Modular Inverse Table Generator

Find all modular inverses for a given modulus #### Number Base Converter

Convert a number between different number bases. binary, octal, hex, hexadecimal, decimal, base #### One Variable Statistics Calculator

Calculate one variable statistics, construct Box-and-Whisker plots. #### Pascal's Triangle Generator

Pascal's Triangle Online Generator #### Permutation List Generator

Generating all possible permutations for a string sequence. #### Polygon Calculator

Calculate the perimeter, area, and centroid of a polygon. #### Prime Factorization Calculator

Find the Prime Factorization of a Given Integer. #### Quadratic Equation Step by Step Solver

Quadratic Equation Solver with Step by Step Explanation using up to three different methods. #### Random Number Generator

Online Customized Random Number Generator. #### Random Number Picker

Pick a Random Integer. #### Simple Arithmetic Expression Solver

Solving multiple arithmetic expressions at once. #### Simple Waitlist Manager

Manager simple waitlist on a simple computer; simple queue management. #### Sieve of Eratosthenes Player

Step by step showing how the Sieve of Eratosthenes works. #### Stopwatch

A stopwatch program that is able to display in different formats. #### String Manipulator

Manipulating strings online. #### Sudoku Solver

Solving Sudoku Online. #### Subsets Generator

Generating all possible subsets of a given sets. #### System of Linear Equations Solver

Solving systems of linear equations online. #### Tally Counter

Online Tally Counter #### Two Variable Statistics Calculator

Calculate two variable statistics, Correlation, Line of Best Fit, Residual Plot. #### Two Way Table Analyser

Construct Two-Way Frequency Table, Relative Frequency Tables, Expected Counts, Chi-Square. #### Unit Circle Visualizer

Visualize Trigonometric Function Values on a Unit Circle. #### Yes-No Counter

Online Tally Counter for Two Categories.