
CodePen: A web-based, open-source HTML, CSS, and JavaScript editor for code experimentation, collaboration, and learning.
codepen.ioCrawled Oct 16, 2026
The company lets users upload and use any file.
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CodePen 2.0 is an all new editor experience featuring a file system, compiler, realtime & async collaboration, deployment, and more.
CodePen PRO Asset Hosting lets users upload a file once for use across CodePen. It includes tools to manage and edit files and optimize images.
CodePen moved image uploads to the open-source library Uppy for business reasons. Uploads are faster, and the savings enabled higher PRO plans to increase file size and storage limits.
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Collections are groups of Pens and other Collections that users can arrange, share publicly or privately, and access through a shareable URL.
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CodePen is a social development environment where users write code in a browser and see results as they build. It focuses primarily on front-end languages such as HTML, CSS, and JavaScript, and preprocessing syntaxes.
Build, share & learn with CodePen 2.0, the best community for developers with an all new online code editor featuring a file system, compiler, realtime & async collaboration, deployment, and more.
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CodePen Pens are public by default, but privacy defaults and individual Pen settings can be changed. Users can invite others with Viewer or Editor access for realtime collaboration.
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