Browse all apps

Generate custom QR codes with logos, colors, and UTM tracking. Create branded QR codes for links, WiFi, contacts, and more.

by Nuung

Write HTML, CSS, and JavaScript with instant live preview. A lightweight CodePen-style editor in your browser.

by ItzBlueSword

Convert text to Morse code and back. Listen to the encoded message with audio playback.

by arindal1

Interactive simulation of a pendulum swinging over magnets, demonstrating beautiful deterministic chaos patterns.

by codebox

Classic sliding block puzzle. Move pieces to free the large block and guide it to the exit in as few moves as possible.

by CoderLim

A full-featured image editor with shapes, text, free drawing, gradients, undo/redo, and color picker. Built with Fabric.js.

by CodeHole7

A playful, animated web experience for asking someone to be your Valentine. Cute animations, interactive buttons, and a sweet surprise ending.

by CodeKageHQ

Turn JavaScript code into draggable bookmarklets instantly. Paste your code, get a ready-to-use bookmarklet link you can drag to your browser toolbar.

by caiorss

A powerful QR code toolkit — analyze, decode, and recover damaged QR codes step by step. See the internal structure, edit modules, and extract data from partial codes.

by Merricx

A tiny, elegant code editor for the browser with syntax highlighting. Write and edit code in a clean, minimal interface.

by kazzkiq

A live GLSL fragment shader editor with instant preview. Write WebGL shaders and see the results in real-time on a canvas.

by patriciogonzalezvivo

Create music from math — write tiny formulas that generate audio in real time. A bytebeat player for composing algorithmic music with just a few characters of code.

by BSquareII

Learn Morse code by ear and touch. Tap for dots, hold for dashes. Three difficulty levels — from the simplest six letters to full alphabet and digits with speed bonuses.

by Mercutio

A live-coding music sequencer where every letter of the alphabet is an operator. Route signals through a 2D grid to generate sound.

by Hundred Rabbits

A candlelit night-locksmith deduces the lost combinations of antique strongboxes — by reading the tumblers, and by listening. Set gemstones into the brass dial, pull the lever to test the lock, and read the glass cutaway: gold tumblers mean a gem is in the right well, silver means right gem, wrong well. Spend a precious listen on the brass ear-horn to learn exactly how many of one gem hide in the answer. Crack each box before your roll of picks runs out, recover the curio inside for the shelf, and chase the daily Strongbox of the Day.

by riddlerzzz

Learn how Git really works — visually. Build real Git commands by tapping (no typing) and watch a live commit graph branch, merge, and rebase in real time. A guided 17-lesson curriculum takes you from your first commit to untangling diverged branches, plus Practice, Sandbox, and a Daily puzzle.

by Mercutio

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

by vansh-codes

An interactive JavaScript console. Type JavaScript, see results instantly. Perfect for experimenting and learning.

by openexchangerates

A programming puzzle game. Write JavaScript to control a building elevators and transport passengers as efficiently as possible.

by magwo

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

by 1j01

Study 3,600+ chess openings on an interactive board. Search by name or ECO code, step through moves, bookmark favorites, and track your study progress.

by Launch Arcade

Design color gradients and export to CSS, SVG, Python, and more. Shareable via URL.

by eltos

A collaborative platform where developers worldwide can showcase and discover diverse coding projects across web development, mobile apps, machine learning and more.

by MrAshwin2142

An interactive graphing tool for visualizing and animating mathematical concepts like linear transformations and matrix operations.

by soerenfriese

Extract the dominant color and palette from any image.

by lokesh

A draw-and-guess party game. Play solo — sketch a secret word and race an AI to guess it — or open a private room and take turns drawing while your friends shout out answers.

by Launch Arcade

Interactive periodic table of 118 elements. Color-coded by category, filterable by phase and type. Click any element for detailed properties: atomic mass, density, melting/boiling points, electron configuration, and more.

by Launch Arcade

Compare two blocks of text side-by-side with highlighted differences. Your text never leaves the browser.

by Jason Tally

Generate beautiful color palettes. Random, analogous, complementary, triadic, and pastel modes. Press spacebar for new palettes.

by Launch Arcade

A visual editor for creating and manipulating SVG paths. Click to add points, drag to adjust curves, and export clean SVG code.

by Yqnn

Pick any color and instantly see HEX, RGB, HSL, and CMYK values.

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

An open-source puzzle game editor and engine. Design, build, and play tile-based puzzle games right in the browser.

by increpare

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

by Launch Arcade

A beautiful Markdown and HTML editor that lets you write rich text with live preview. Switch between Markdown, HTML, and WYSIWYG modes seamlessly.

by bevacqua

Browse 148 named CSS colors, build palettes, save them to the cloud, and share to a community gallery. Filter by hue, sort by lightness, and export as CSS custom properties.

by Launch Arcade

Browse 1,900 Google Fonts, preview heading and body combinations live, and copy the CSS snippet for your project.

by stryfe359

Explore all 118 elements with a beautiful glassmorphism periodic table. Search, filter, and learn about each element.

by independent-coder

A polished color picker with web colors, theme palettes, and custom color selection. Pick from a familiar Office-style interface or enter hex and RGB values directly.

by evoluteur

A page displaying every standard HTML5 element. Great for testing CSS themes, browser rendering, and learning HTML5 tags.

by cbracco