Tech
1,683 interactive pages · most loved first · page 54 of 71· Tonble one of these
Space Search
A search engine and visualization for space objects that shows satellite orbits around Earth, letting you explore what i…
Spamnesty
A free service that replies to spam on your behalf: forward a spam email and a bot pretending to be a real person keeps…
SparrowMap
A free open-source map of police stations, license plate readers, traffic cameras, and radar traps, plus guides for buil…
Speak & Spell JS
A browser emulator of the 1978 Texas Instruments Speak & Spell with authentic recorded sound, faithful to the original t…
Speaker Cleaner
A free web tool that plays a specially tuned sound frequency to push water and dust out of a phone speaker and restore c…
Specificity Calculator
A small developer tool that visualizes exactly how specific a CSS selector is by scoring its IDs, classes, and elements…
Speechnotes
A free browser-based speech-to-text notepad that transcribes spoken words into text in real time using your microphone,…
Speed Solve
A browser math whiteboard called Speed Solve that works out problems such as simplifying fractions, derivatives and syst…
SpeedCoder
A free typing tutor where you practice touch typing on real code snippets in C, JavaScript, Python and more, with lesson…
Spline Examples
A gallery of interactive 3D scenes and web experiences built with a browser-based design tool, showcasing playful animat…
Spread That Sheet
A free in-browser tool that turns single-page PDFs into realistic book spreads, with gutter shadows, page curvature, pap…
Spreadsheet Converter
A tool that converts any picture into an Excel spreadsheet with each pixel split into its red, green, and blue component…
Sprites-as-a-Service
A generator that grows a cute 8-bit avatar from your name using cellular automata, with a write-up of how the technique…
SQL Teaching
An interactive tutorial that teaches SQL step by step, with exercises you run in the browser to learn queries and databa…
SQLBolt
A series of interactive lessons and exercises that teach SQL directly in the browser, from basic queries to table design…
Squoosh
An in-browser image compressor that lets you drag a slider to compare quality side by side while shrinking photo file si…
Stacked Game of Life
An interactive twist on Conway's Game of Life titled A Game of Life and Ghosts, built by Koen van Gilst, where you can w…
Stackie
A tiny stack machine for texture generation, where short programs of stack operations produce procedural images you can…
StackSort
A real implementation of the xkcd joke algorithm that sorts a list by fetching random StackOverflow answers and running…
Stacktower
Inspired by xkcd 2347, it stacks the real dependencies of packages like fastapi or serde into teetering block towers, al…
Star History
A chart tool that plots and compares the GitHub star growth of open source repositories over time, handy for seeing how…
Startup Funding Simulator
A calculator that lets you add investors, SAFEs, and priced rounds to simulate how much founder dilution you will take a…
StatiCrypt
A browser tool that encrypts a static HTML page with a password, producing a self-contained file that asks visitors for…
StationView
Real-time UK train departure boards for any station, styled to look and behave like the displays on the platform, from L…
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