Tech
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Python for Everybody
A free course for learning Python from scratch, with lessons, exercises, and materials that take beginners from basic sy…
Python Tutor
A free tool that visualizes code execution step by step, drawing variables and data structures as you run Python, JavaSc…
QArt Coder
A generator that turns an image into a working QR code, bending the pixels so the code scans normally while still lookin…
Q-Learning 3D
A 3D WebGL simulation where a robot agent learns to navigate using Q-learning, so you can watch reinforcement learning i…
QR Clock
A clock that generates a scannable QR code for every second of the day and animates the changes, turning timekeeping int…
QR Code Generator
A free, lightweight QR code generator that turns links or text into a scannable code right in the browser, with no signu…
QR is cool
An interactive demo of QR code error correction: pick or scan a code, then scribble on it or cover parts and see it stil…
QR Picture
A generator that turns a photo into a scannable, high-definition QR code by controlling pixel placement, so the code kee…
qrClock
A clock that shows the time as a QR code refreshed every second, so scanning it with your phone syncs you to the present…
qrsticks
A QR code built entirely out of tiny stick figures that still scans on your phone, with a short explanation of why decod…
QRZ.com
A callsign lookup database and community hub where amateur radio operators showcase their stations and connect with othe…
Quake 3 WebGL Demo
A classic Quake 3 deathmatch map rendered in WebGL right in the browser, letting you fly and run through the original le…
Quake-SRP
The 1996 shareware episode of Quake ported to safe Rust and WebAssembly, playable right in your browser with mouse look,…
Quality News
An alternative ranking of Hacker News stories that experiments with a fairer algorithm for surfacing quality posts inste…
Qualys SSL Server Test
A free deep-dive scanner that grades any public website's SSL/TLS configuration and flags outdated protocols or certific…
Quantization From the Ground Up
A visual, interactive guide to how language models store numbers as floats and why squeezing them to 4 or 8 bits barely…
Quantum Canvas
An interactive 3D visualization of a qubit with real-time noise simulation, showing how errors disturb the state of a qu…
Quantum Coin
Flip a coin whose outcome comes from real quantum randomness generated on IBM quantum computers, a small hands-on demo o…
Quantum Country
An experimental textbook on quantum computing by Andy Matuschak and Michael Nielsen that embeds spaced-repetition flashc…
Quayola
The portfolio of artist Quayola, whose algorithmic works include robot-carved unfinished sculptures, generative landscap…
Queueing: An Interactive Study of Queueing Strategies
A visual, interactive essay on how FIFO, LIFO, priority queues and other strategies behave when a server is flooded with…
quickimagekit.com
Interactive
Quick Image Kit
A browser-based image compressor with a quality slider and instant size comparison, plus resize, convert, crop and favic…
Quick, Draw!
Doodle a prompted object in under 20 seconds while a neural network tries to guess what you are drawing, then browse mil…
QuicklyPDF
Free PDF tools that merge, split, and convert files entirely in your browser, with no uploads or servers so documents st…
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