CodePen

An online editor for writing HTML, CSS and JavaScript and previewing the result live.

FreemiumProprietaryWeb
Official websitecodepen.io

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About CodePen

CodePen is a browser-based code editor for front-end work. You write HTML, CSS and JavaScript in separate panes and see the rendered result update beside them, which makes it useful for trying out an idea, building a small demo or reproducing a bug to share with others.

Because it runs in the browser, there is nothing to install and a finished example can be shared as a link. It suits front-end developers, designers and learners who want quick experiments rather than a full project setup.

Strengths

  • Live preview of HTML, CSS and JavaScript as you type
  • Nothing to install
  • Examples are easy to share as links

Limitations

  • Needs an internet connection
  • Suited to small demos rather than full projects
  • Proprietary hosted service

Details

Pricing
FreemiumFree to use, with paid plans for additional features.
License
Proprietary
Developer
CodePen
Platforms
Web
How it runs
Web application
Works offline
No
Best suited for
Front-end developers and learners building quick, shareable demos
Last verified
Added
Provenance
Facts checked against the developer's own pages and store listings, 1 sources on file.

Alternatives to CodePen

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Software that can replace CodePen for an important use case, and what changes if you switch.

  • StackBlitz

    A browser-based IDE that runs full-stack Node.js web projects entirely inside the browser tab.

    FreemiumProprietaryWeb

    StackBlitz is a hosted browser IDE that runs full-stack Node.js projects in the tab, handling larger web projects than CodePen demos, and needs a modern browser with WebAssembly.

  • Phoenix Code

    An open-source code editor for web development that continues the Brackets project, with live preview.

    FreemiumOpen sourceWindowsmacOSLinuxWeb

    Phoenix Code is an open-source web editor with live preview that runs in a browser or on the desktop, keeping files as projects rather than hosted shareable pens.

CodePen as an alternative

Listings that name CodePen as an alternative.

  • JSFiddle

    An online playground for writing and testing HTML, CSS, JavaScript, React and Tailwind snippets.

    FreemiumProprietaryWeb

    CodePen also offers a browser editor with live HTML, CSS and JavaScript preview and shareable links, as a proprietary freemium hosted service.

Similar software

Related functionality, not necessarily a direct replacement.

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