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codepen.io

https://www.codepen.io

C70
Performance 34Accessibility 86SEO 92Best Practices 81

5 technologies detected · Last audited Apr 7, 2026

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Technology stack

Cdn

Cloudflare

Frontend

AngularJS Cloudflare Turnstile HSTS HTTP/3

Frequently asked questions about codepen.io

What technology does codepen.io use?

codepen.io is built with AngularJS, Cloudflare Turnstile, HSTS, HTTP/3, and Cloudflare.

Is codepen.io fast?

No — codepen.io scores 34/100 on Lighthouse mobile performance, indicating significant optimization opportunities.

Is codepen.io accessible?

Mostly — codepen.io scores 86/100 on Lighthouse accessibility, with a handful of automated issues to address.

What CMS does codepen.io use?

No CMS fingerprint was detected on codepen.io — it may use a static site generator or a custom application.

Where is codepen.io hosted?

codepen.io is served through Cloudflare.

Does codepen.io use HTTPS?

Yes — codepen.io serves traffic over HTTPS.

1 audits

Apr 7, 2026 20:29 UTC Latest

/

Worker: worker-madrid-spain-04

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Scores

Performance 34Accessibility 86Best Practices 81SEO 92PWA 0

Timing

LCP: 11.91 sFirst Contentful Paint: 9.71 sTTFB: 88 msTotal Time: 88 msCumulative Layout Shift: 0.007

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