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455 apps · 13 categories
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A realistic rotary knob control you can twist with your mouse or finger. A satisfying, tactile web component for adjusting values.
by denilsonsa
Calculate simple and compound interest instantly. Enter principal, rate, and time to see how your money grows — works offline as a progressive web app.
by SafdarJamal
Compute mean, median, mode, standard deviation, and more from a data set.
by Launch Arcade
Build and simulate electronic circuits with drag-and-drop components including logic gates, LEDs, switches, and more.
Calculate pace, finish time, or distance for running and cycling. Includes mile/km splits table, preset race distances, and imperial/metric support.
by Launch Arcade
Build and simulate digital logic circuits with AND, OR, NOT, XOR gates, LEDs, and clock signals.
by RednibCoding
Convert between units of length, weight, temperature, volume, and more.
by Launch Arcade
A web-based logic circuit simulator. Place gates, connect wires, and build working digital circuits right in the browser.
by RednibCoding
Convert between binary, decimal, octal, and hexadecimal number systems.
by Launch Arcade
Calculate tips based on bill amount, service quality, and number of people splitting.
Roll beautiful 3D dice right in your browser. Supports multiple dice types (d4, d6, d8, d10, d12, d20) with realistic physics and animations.
Calculate your Body Mass Index based on height and weight to evaluate your health status and determine your ideal weight range.
by abhigyan02
A Wordle-inspired game for binary numbers. Guess the hidden 8-bit unsigned integer in 8 tries using binary, decimal, or hex input.
Generate unique pixelated avatar icons from any text. Type a name or email and get a distinctive, colorful identicon instantly.
by laurentpayot
Drag-and-drop digital logic circuit simulator. Build circuits with AND, OR, NOT, flip-flops, LEDs, and more.
Convert between Celsius, Fahrenheit, and Kelvin instantly. Enter any temperature and see all three units update in real time.
An interactive JavaScript console. Type JavaScript, see results instantly. Perfect for experimenting and learning.
Compress JSON into ultra-short URL-friendly strings. Paste JSON, get a crushed version you can share in URLs or query params.
You are a small, determined comet on a fixed orbit through a busy little solar system. Hold to burn, release to coast — that is the whole game, and it is plenty. Planets, moons, and asteroid trams cross your path at four glowing intersections, and one bump ends the run. Graze past a crosser for near-miss bonuses, chain them for multipliers, and ride the blaze at top speed when your nerve holds. Every lap tightens the traffic. Endless score-chasing with unlockable comet palettes, plus a seeded Daily Crossing where everyone threads the same sky, with a shared leaderboard and streaks.
Calculate your Total Daily Energy Expenditure. Get your BMR, maintenance calories, and targets for fat loss, maintenance, and bulking.
by Launch Arcade
Plot mathematical functions in real-time on an interactive graph. Supports trigonometric, logarithmic, and polynomial functions.
Convert Scratch projects into standalone HTML files. Upload a Scratch project and download a self-contained web page you can share.
by SheepTester
A minimalist speed reading tool. Paste text and read at up to 500 words per minute using rapid serial visual presentation.
by Zolmeister
A live-coding music sequencer where every letter of the alphabet is an operator. Route signals through a 2D grid to generate sound.
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