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A browser-based spreadsheet app inspired by Excel. Create cells, enter formulas, format data, and work with multiple sheets.

by kishanrajput23

Watch cells evolve in Conway's Game of Life. Draw initial patterns, hit play, and see complex structures emerge from simple rules.

by michurin

Interactive simulation of Conway's Game of Life. Draw patterns, adjust speed, and watch cellular automata evolve.

by Pedro Verruma

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

by myliang

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

by CodingTrain

Interactive grid-based pathfinding visualizer supporting A*, Dijkstra, BFS, DFS, and more.

by qiao

Interactive 2D cellular automata with drawing tools, customizable rules, and speed control.

by AdamUllmann

A nonogram (Picross) puzzle game with 40 hand-crafted pixel-art puzzles. Fill cells by following the row and column number clues to reveal hidden icons — rockets, skulls, snowflakes, and more. Filter by Easy, Medium, or Hard, track your best times, and reveal full-color pixel art when you solve each puzzle.

by Launch Arcade

Classic number puzzle with multiple difficulty levels and a hint system. Fill the 9x9 grid so every row, column, and box contains 1-9.

by Hua-Ming Huang

Explore prime numbers on an interactive grid — watch patterns emerge as primes light up across thousands of numbers. A beautiful way to see the structure in primes.

by Abhrankan-Chakrabarti

Plot a route through a star-field, visit every planet, and manage your fuel. Today's grid is the same for every pilot — optimize it.

by Launch Arcade

Convert tables between CSV, Markdown, SQL, and HTML formats instantly. Paste data in any format, edit it in a spreadsheet-like form, and export to the format you need.

by guntrip

The classic naval strategy game against a smart AI opponent. Place your fleet and sink the enemy before they sink you.

by Shahir-47

Perform matrix operations: addition, multiplication, determinants, and more.

by Launch Arcade

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

by vansh-codes

A browser simulation of the Teenage Engineering PO-20 drum machine. Load custom samples and compose beats with the built-in sequencer.

by nicholasgasior

Convert Excel spreadsheets to Markdown right in your browser. Drop an .xlsx file and get clean tables, text, and images as Markdown — all processed locally, nothing uploaded.

by igapyon

Generate and solve mazes with multiple algorithms and tile shapes.

by mdchaney

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

by nicedayzhu

Test your knowledge of JavaScript's tricky == operator. Fill in the equality table by guessing which comparisons return true — a fun challenge for developers.

by slikts

See public holidays across 202 countries on a visual calendar. Click any date to see which countries are celebrating. Great for scheduling across time zones.

by launcharcade

Define states, symbols, and transitions, then watch a Turing machine execute step by step.

by VittGam

A customizable browser start page featuring a live clock and habit tracker to help organize your daily routine.

by MariusBongarts