octocatstartv headernumbered-list123split-screen

CodePen is a playground for the front end web.

Show off your latest creation and get feedback. Build a test case for that pesky bug. Find example design patterns and inspiration for your projects.

Find out more Sign me up

Background by Matei Copot

Picked Pens

View More Pens

Picked Posts

View More Posts

Picked Collections

View More Collections

76 Pens

Toggle Mania!

Flip. Flop. Switch. Swatch.

7 Pens


Looking at all possible uses of Flexbox such as justify content, flex-flow shorthand, adding padding and margin, the order, direction and much more

15 Pens

SnapFoo Demos

Demos utilizing the SnapFoo SVG animation library.