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w3.org

https://jigsaw.w3.org

C77
Performance 100Accessibility 89SEO 92Best Practices 92

3 technologies detected · Last audited Apr 21, 2026

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Technology stack

Cdn

Cloudflare

Frontend

Cloudflare Bot Management HTTP/3

Frequently asked questions about w3.org

What technology does w3.org use?

w3.org is built with Cloudflare Bot Management, HTTP/3, and Cloudflare.

Is w3.org fast?

Yes — w3.org scores 100/100 on Lighthouse mobile performance, in the top tier of audited sites.

Is w3.org accessible?

Mostly — w3.org scores 89/100 on Lighthouse accessibility, with a handful of automated issues to address.

What CMS does w3.org use?

No CMS fingerprint was detected on w3.org — it may use a static site generator or a custom application.

Where is w3.org hosted?

w3.org is served through Cloudflare.

Does w3.org use HTTPS?

Yes — w3.org serves traffic over HTTPS.

3 audits

Apr 21, 2026 19:00 UTC Latest

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Worker: worker-saopaulo-br-01

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Scores

Performance 100Accessibility 89Best Practices 92SEO 92PWA 0

Timing

LCP: 935 msFirst Contentful Paint: 935 msTTFB: 168 msTotal Time: 168 msCumulative Layout Shift: 0.010
Apr 16, 2026 17:10 UTC

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Worker: worker-madrid-spain-04

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Scores

Performance 96Accessibility 100Best Practices 100SEO 100PWA 0

Timing

LCP: 2.50 sFirst Contentful Paint: 2.05 sTTFB: 104 msTotal Time: 104 msCumulative Layout Shift: 0.000
Apr 4, 2026 17:18 UTC

/

Worker: worker-santaclara-us-01

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Scores

Performance 97Accessibility 100Best Practices 100SEO 100PWA 0

Timing

LCP: 2.20 sFirst Contentful Paint: 1.98 sTTFB: 32 msTotal Time: 33 msCumulative Layout Shift: 0.000

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