w3schools html editor online code example
Example 1: online html editor
<!-- Answer to: "online html editor" -->
<!--
A common good "online editor" would be:
https://jsfiddle.net/
However, for an online editor focusing specifically on html
this one is pretty good:
https://html-online.com/editor/
-->
Example 2: online html editor
<!-- Use CodePen -->
https://codepen.io/