CodePen is a social development environment for front-end designers and developers. You can build and deploy a website, show off your work, find inspiration and more.
You can search source code you want. Just write what you want to write at the top of the screen and press Enter
You can create a pen, even if you are a visitor. Just click Start coding at the top left corner.
If you click the down arrow at the right top corner of each editor you will see some settings. You can tidy and analyze your code, maximize or minimize the editor and ford or unfold everything.
Click Settings to configure HTML, CSS and JS preprocessors and the editor’s behavior.
You can change the view by clicking Change View
…and many more… THE END!!!