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CodePen

codepen.io

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Spec score 8.7 #19 of 138 in Coding Playgrounds

What it is

CodePen is a web-based social development environment for creating, testing, deploying, sharing and discovering front-end code. In a Pen, users write HTML, CSS and JavaScript and see a live browser preview. It supports HTML preprocessors such as Markdown, Haml, Slim and Pug, and CSS preprocessors including Sass, Less, Stylus and PostCSS. The CodePen 2.0 editor supports automatic preprocessing, live previews, file systems, version history, collaboration and one-click Pen deployment. Users can add external CSS and JavaScript resources, reuse other Pens, find libraries through CDNjs and import bare npm packages through its compiler. Pens can be embedded on other websites, and CodePen documents a REST API and other embed and prefill options. Pens and Projects are public by default. PRO users can make Pens and Collections private, but anyone with the shared URL can view them without logging in. The free plan includes unlimited public Pens and three files per Pen. Starter costs $8 a month, Developer $12 a month and Super $26 a month. CodePen does not offer a self-hosted version.

Spec sheet

Purpose
CodePen is a social development environment for front-end designers and developers to build, test, deploy, share, and discover front-end code.Read 30 Sep 2026 · codepen.io
Intended users
CodePen describes itself as useful for developers of any skill and particularly empowering for people learning to code, as well as for prototyping, debugging, client review, hiring, and portfolios.Read 30 Sep 2026 · codepen.io
Free plan
YesRead 20 Sep 2026 · codepen.io
Integrations
Users can add external CSS and JavaScript resources, use other Pens as resources, and search for JavaScript and CSS libraries from CDNjs.Read 30 Sep 2026 · blog.codepen.io
Security
CodePen says it uses security processes, firewalls, and generally available security technologies, and states that it cannot guarantee data security from intrusion or unauthorized release.Read 30 Sep 2026 · blog.codepen.io
Support
CodePen directs users to its documentation and an online support form, and lists [email protected] as a contact address.Read 30 Sep 2026 · codepen.io
Headquarters
Bend, Oregon, United StatesRead 28 Sep 2026 · codepen.io
Founded
2012Read 28 Sep 2026 · codepen.io
Browser editor
Pens let users write HTML, CSS, and JavaScript with a real-time preview in the browser.Read 30 Sep 2026 · codepen.io
CodePen 2.0
The CodePen 2.0 editor supports automatic preprocessing, live previews, file systems, version history, collaboration, and one-click Pen deployment.Read 30 Sep 2026 · blog.codepen.io
Embeds and API
Pens can be embedded on other websites, and CodePen documents a basic REST API, POST-to-prefill, oEmbed, and prefill embeds.Read 30 Sep 2026 · blog.codepen.io
npm packages
CodePen's compiler can process bare npm package imports with import maps, and package search is powered by the jsDelivr API.Read 30 Sep 2026 · blog.codepen.io
Preprocessors
CodePen supports HTML preprocessors including Markdown, Haml, Slim, and Pug, and CSS preprocessors including Sass, Less, Stylus, and PostCSS.Read 30 Sep 2026 · codepen.io
Private content
PRO private Pens and Collections are hidden from public search and profiles, but anyone with the unguessable shared URL can view them without logging in; CodePen says this is not enterprise-level security.Read 30 Sep 2026 · codepen.io
Private projects
YesRead 20 Sep 2026 · codepen.io
Public content
Pens and Projects are public by default, and the privacy policy says public Pens and Projects are automatically licensed under MIT.Read 30 Sep 2026 · blog.codepen.io
Self-hosting limit
CodePen states that it does not offer a self-hosted version.Read 30 Sep 2026 · codepen.io
Team collaboration
Teams share Pens, Collections, Assets, and billing, and team members get PRO features and can edit Team Pens together.Read 30 Sep 2026 · codepen.io

Plans and prices

Free Free Unlimited Public Pens · 3 files per Pen Read 30 Sep 2026 · codepen.io
Starter $8 a month Billed at $96/year. 50 files per Pen · 5 MB media files · 2 GB asset hosting · 5 collaborators · Privacy Controls · No ads Read 30 Sep 2026 · codepen.io
Developer $12 a month Billed at $144/year. 150 files per Pen · 20 MB media files · 25 GB asset hosting · 10 collaborators · Privacy Controls · No ads Read 30 Sep 2026 · codepen.io
Super $26 a month Billed at $312/year. 300 files per Pen · 30 MB media files · 50 GB asset hosting · 15 collaborators · Privacy Controls · No ads Read 30 Sep 2026 · codepen.io

Every CodePen plan and price →

Strong points and limits

Strong points

  • Pens provide live previews of HTML, CSS and JavaScript.
  • Supports a range of HTML and CSS preprocessors.
  • Free plan includes unlimited public Pens.
  • Team members can edit Team Pens together.

Limits

  • Pens and Projects are public by default.
  • Shared URLs allow access to private Pens without login.
  • There is no self-hosted version.
  • Free Pens are limited to three files each.

Who it suits

CodePen suits front-end developers and people learning to code, as well as users working on prototypes, debugging, client review, hiring or portfolios. Teams can share and edit Pens together.

Verdict

CodePen offers a browser workspace for front-end code, with a free tier and paid plans starting at $8 a month. Consider its public-by-default content and link-based access to private Pens before using it for sensitive work.

Where Specifiction places it

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