CodeSandbox

CodePen is an open-source, community based platform for code editing . Unlike traditional text editor software, CodePen provides a browser-based, SAAS solution for front-end web designers. For new developers, it also acts as an amazing learning tool so you can catch your mistakes early in an interactive environment.

CodePen is an online community for testing and showcasing user-created HTML, CSS and JavaScript code snippets . It functions as an online code editor and open-source learning environment, where developers can create code snippets, called “pens,” and test them.

The gist of it is open source. Anyone can use the code you put on CodePen for whatever they wish – but if they do – that code also must have this same license . This is to encourage open sharing of code. Remember that any code you post on CodePen should be compatible with this license or it is subject to removal.

Public Pens and Projects on CodePen are MIT licensed, but Private Pens and Projects have no license at all . This is so you can apply your own license if you wish. For example, if you wish to send work-in-progress to a client, you can still be safe in that you retain full ownership and the code can’t be copied freely.