CodePen is described as 'social development environment for front-end designers and developers' and is a popular website in the Development category. There are more than 50 alternatives to CodePen, not only websites but also apps for a variety of platforms, including Windows, Mac, Linux and Android. The best alternative is jsFiddle, which is free. Other great sites and apps similar to CodePen are Repl.it (Freemium), CodeSandbox (Free, Open Source), JS Bin (Freemium) and Outpan (Free).
- Codiad is an open source, web-based, cloud IDE and code editor with minimal footprint and requirements View 42 alternatives to Codiad
"Given its age and number of viable alternatives now available, Codiad is no longer under active maintenance by core contributors."
- Free • Open Source