Open-source Code Playground tools

2 SaaS tools with self-hostable alternatives

CodePen alternatives

CodePen is an online IDE and social platform for front-end development, where users create and share HTML, CSS, and JavaScript snippets (Pens). It is used by developers for prototyping UI components, learning CSS techniques, and sharing demo code. CodePen PRO adds private Pens, Collab Mode for pair-programming, and offline mode.

1 OSS alts · ★ 7,147

Glitch alternatives

Glitch is a browser-based development environment for building and deploying small web projects, where each project gets a live URL immediately without any deployment setup. It targets beginners and educators who want to share working code examples, and developers who want to prototype without local tooling. Projects can be forked (remixed) by anyone to build on.

2 OSS alts · ★ 78,567