Tech
1,683 interactive pages · most loved first · page 12 of 71· Tonble one of these
ColorBox
A color palette generator for building accessible color systems, with customizable curves for hue, saturation, and lumin…
Colormind
An AI color palette generator trained on photos, movies, and art that produces cohesive five-color schemes you can lock…
Colors & Fonts
Free color tools for designers and developers, including curated palettes, copy-paste CSS gradients, a palette builder w…
Colorspace
Explore color relationships in OKLCH, OKHSL and CIELAB with a real-time 3D visualization, and build harmonious palettes…
Combination Sum Calculator
A calculator that takes a list of numbers and shows every combination of them that adds up to a target value, handy for…
Combustion Lab
A browser-based internal combustion engine simulator where you build an engine, watch the pistons run and read real ther…
Commitment Issues
Paste any public GitHub repo and get an official death certificate with cause of death, last commit as last words and re…
Compiler Explorer
Matt Godbolt's interactive tool showing the assembly output of dozens of compilers in real time as you type code in many…
Compressor.io
A free online image optimizer that compresses JPEG, PNG, SVG, GIF, and WEBP files, with lossy and lossless options plus…
Compute.toys
A WebGPU playground gallery of compute shader demos like path tracers and pendulum simulations, which you can browse, ru…
Connected Papers
A visual tool that builds an explorable graph of related academic papers around any work, helping researchers map a fiel…
Constraint Systems
A collection of experimental, keyboard-driven web apps that offer alternative interfaces for editing images and text, ea…
Conversao
A simple online tool that converts a value in any unit to all the other units at once, covering lengths, weights, volume…
Convert to it
A universal file converter that runs in the browser and turns almost any file into almost any other format, handling odd…
Convertio
A universal online file converter that switches between hundreds of document, image, audio, and video formats directly i…
ConvNetJS
A JavaScript library with live demos that train neural networks right in your browser, including image classifiers, regr…
Cool Fonts
A text generator that turns whatever you type into dozens of fancy Unicode font styles, ready to copy and paste into bio…
CoordinateMapper
A free tool that converts coordinates between latitude/longitude, UTM, MGRS, and UK grid references, plots them on a map…
CopyChar
A simple web app for finding special characters such as currency symbols, arrows, and math signs, then copying them to y…
Correct Horse Battery Staple
An xkcd-style password generator that strings random common words into long, memorable passphrases right in your browser…
Corrupt-a-File
A joke tool that scrambles an uploaded document into an unopenable corrupted file, built around the classic excuse that…
Cosmic Particles
An interactive WebGL simulator with several cosmic modes, where thousands of glowing particles respond to your mouse and…
Countdowns
A site for making beautiful countdown timers to any date or event and sharing them with friends, from birthdays and trip…
Cover Your Tracks
The EFF's browser test that shows how uniquely trackers can fingerprint you, with a clear breakdown of each signal your…
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