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A fun interactive CAPTCHA challenge. Prove you are human by solving visual puzzles and see how CAPTCHA verification works.

by makeuseofcode

Edit, format, validate, and explore JSON with tree and code views.

by Launch Arcade

Form words using the given letters. Every word must include the center letter. Find the pangram for bonus points.

by jamescalixto

Classic Othello board game with AI opponent.

by Launch Arcade

Classic gem-swapping match-3 puzzle on an HTML5 canvas. Create chains, combos, and clear the board.

by rembound

Freecell solitaire card game with responsive design for desktop and mobile.

by nicedayzhu

Classic backgammon board game. Roll the dice, move your checkers, and bear off before your opponent.

by binarymax

The definitive browser Mahjong Solitaire - 84 hand-crafted board layouts, 13 tile sets, keyboard shortcuts, statistics tracking, and a built-in tile editor. Clear all tiles by matching free pairs to win.

by ffalt

Test regular expressions with live highlighting. See matches, groups, and flags in real-time.

by Launch Arcade

Tap letter tiles to unscramble words before the clock runs out. Six categories — Animals, Fruits, Sports, Countries, and Food — plus a daily challenge mode and global leaderboard. 700+ words, no typing required.

by Launch Arcade

Paste HTML and get clean Markdown output instantly. A live converter for turning web content into readable, portable Markdown text.

by stonehank

Practice addition and number skills with interactive math games for all ages.

by jkanev

Estimate mortgage payments and view amortization schedules.

by Launch Arcade

A lightweight web spreadsheet with formulas, cell formatting, merge, freeze panes, and multiple sheets. Excel-like editing in the browser.

by myliang

Jump pegs to remove them until only one remains in this classic board puzzle.

by ggades

An interactive duration picker for hours, minutes, and seconds. Scroll or type to set precise time durations — clean, lightweight, no dependencies.

by nadchif

Watch procedural worlds generate tile by tile using the Wave Function Collapse algorithm. Mesmerizing constraint-based generation.

by CodingTrain

Watch a backtracking algorithm solve Sudoku puzzles step by step. Visualize how the solver tries, backtracks, and finds the solution.

by vansh-codes

An elegant browser-based command-line console. Type commands, see output, and build interactive terminal-style experiences in the browser.

by 1j01