CodePen
CodePen
Role
Hosts the CSS-heavy demos embedded in oriz-blog-site posts —
CSS animation walkthroughs, layout primitives, gradient experiments,
SVG art, anything where the front-end is the point and a Node
backend would be overkill. Embedded via CodePen's <script>
embed (turns a <p data-pen-slug="..."> into a live preview).
Free tier
- Unlimited public pens
- Unlimited public embeds
- All front-end preprocessors: Sass, Less, Stylus, PostCSS, Babel, TypeScript via Babel
- External CSS / JS asset URLs (jsDelivr, unpkg) for every pen
- Asset uploads gated on Pro — we don't use them; jsDelivr serves anything we'd upload
Card / subscription required?
NO. Free-tier sign-up is email or GitHub OAuth. No payment method requested.
Embed pattern
<p
class="codepen"
data-height="400"
data-default-tab="result"
data-slug-hash="abcXYZ"
data-user="chirag127"
style="height:400px;border:1px solid #ddd;border-radius:8px"
></p>
<script async src="https://cpwebassets.codepen.io/assets/embed/ei.js"></script>
The script is one-time per page (CodePen dedupes), so multiple pens
on the same post share one <script> tag.
Alternatives
- StackBlitz — used for full-stack / Node-runtime demos
- GitHub Gists — used for static snippets
- JSFiddle — comparable but slower CDN, ad-blocker-prone embeds
- JSBin — abandoned, free tier degraded
- Plunker — comparable but used less in the wild → fewer copy-paste reference posts
Swap cost
Low — pens are exportable via CodePen's "Export ZIP" (free).
Re-host as static HTML on Cloudflare Pages or migrate to a JSFiddle.
The blog post's data-slug-hash is the only site-side coupling.
Why this is our pick
For pure-front-end demos, CodePen has the lowest friction (no GitHub account required for visitors to fork) and the most stable embed script. The community is also where most copy-pasteable CSS demos already live, so linking out to a CodePen-hosted reference fits how readers already think.
Cross-refs
- StackBlitz — sibling for full-stack demos
- GitHub Gists — sibling for static snippets
- Ray.so — generates the og:image for posts embedding pens
- No card-on-file rule