10 Cool CodePen Demos (February 2026)
Source: Dev.to
Color Fan Deck
As part of the colors CodePen challenge, Mads Stoumann created HTML + CSS color swatches showcasing different shades and formats. The demo looks better on larger screens; click on the color name at the top to highlight each swatch.
double‑helix doodle 3
One of Scott R McGann’s pens features shaders and 3D effects. An object sits at the center of the scene, surrounded by an image wrapped to provide a 360‑degree illusion. It’s impressive and could be used for product demos.
Scroll Driven Tri‑Gyro
Adam Argyle shared a gyroscope that spins at different angles and scales as you scroll the page. The smaller colored triangles at the top help keep track of each triangle. The demo is built entirely with CSS and clean HTML. (Note: it will not work on Firefox.)
Birds Follow Cursor with 3D Sound – Three.js
A flock of birds follows your mouse around the screen. While the concept is familiar, Sabo Sugi’s code is well‑organized and commented, making it a great example for experimenting with settings and observing how the particles change.
My type? Someone who doesn’t disappear after the first commit.
For Valentine’s Day, NANOUU created a web game that uses only emojis and text—no images. Use the arrow keys to move left and right, avoid the hearts, aim for the computers, and find your “couple” by committing your code.
Winter Olympics Blizzard
Inspired by a Jon Kantner demo and timed for the Winter Olympics, Holland Blumer built a particle animation where snowflakes accumulate to form the Olympic rings. The effect is smooth and visually striking.
Glass Panel Wave (OKLCH + 3D)
Eric Van Holtz created an interactive animation with warm discs and semi‑transparent panels that float like waves. Move the mouse (or tap on mobile) to see the animation slide and rotate. It’s built with vanilla JavaScript, HTML, and CSS.
Chicky (Voxel by HTML and CSS)
Takane Ichinose coded a cute chick using cubes in HTML and 3D CSS—no JavaScript, WebGL, or Three.js required. If you uncomment the optional JavaScript, you can spin the chick to view it from different angles.
Graph Theory (Chrome Only)
Temani Afif’s demo combines minimal JavaScript for element movement with CSS anchors, style queries, and animations to calculate distances and paths. It works only in Chrome but showcases a mind‑blowing blend of techniques.
Flood Above the Floor
Wakana Y.K. built an interactive 3D web graphics demo with Three.js. The water on the floor reflects light and background images realistically, creating a natural and beautiful effect.