Browse & Analyze

History

Browse recent website audits and performance trends

Technologies

Explore technology stacks detected across the web

Compare

Side-by-side technology comparisons and market share

Stacks

Curated technology stacks and the sites that use them

Reports

Editorial deep-dives on the state of web performance

Favicons

Browse and download favicons from analyzed websites

Learn

FAQ

Common questions about BeaverCheck scores and checks

How We Score

How we calculate scores across 100+ checks

About

The story behind BeaverCheck and the team

Learn

Practical guides to fix common web performance issues

Migration Guides

Step-by-step guides for moving between web technologies

Glossary

Definitions for performance, SEO, and web platform terms

Contrast Checker

Check WCAG color contrast ratios between any two colors

HTTP Headers

Inspect HTTP response headers for any URL

SSL Checker

Analyze SSL/TLS certificate details and chain

DNS Lookup

Look up DNS records for any domain

Redirect Checker

Trace the full redirect chain for any URL

INP Checker

Real-user INP and Core Web Vitals from Google's Chrome UX Report.

API

RESTful API for programmatic website audits

Badge

Embed an auto-updating health score badge on your site

worldcat.org

https://worldcat.org

Performance 30Accessibility 100SEO 92Best Practices 69

14 technologies detected · Last audited Apr 21, 2026

View full audit

Technology stack

Analytics

Google Tag Manager New Relic

Backend

Emotion

Cdn

Cloudflare

Cms

DatoCMS

Frontend

Cloudflare Bot Management Facebook MUI Material UI OneTrust Open Graph React Webpack

Hosting

Next.js

Frequently asked questions about worldcat.org

What technology does worldcat.org use?

worldcat.org is built with DatoCMS, Cloudflare Bot Management, Facebook, MUI, and Material UI.

Is worldcat.org fast?

No — worldcat.org scores 30/100 on Lighthouse mobile performance, indicating significant optimization opportunities.

Is worldcat.org accessible?

Yes — worldcat.org scores 100/100 on Lighthouse accessibility, meeting most WCAG-aligned automated checks.

What CMS does worldcat.org use?

worldcat.org runs on DatoCMS.

Where is worldcat.org hosted?

worldcat.org is hosted on Next.js.

Does worldcat.org use HTTPS?

Yes — worldcat.org serves traffic over HTTPS.

1 audits

Apr 21, 2026 20:02 UTC Latest

Worker: worker-madrid-spain-02

View full report →

Scores

Performance 30Accessibility 100Best Practices 69SEO 92PWA 0

Timing

LCP: 16.19 sFirst Contentful Paint: 4.90 sTTFB: 230 msTotal Time: 230 msCumulative Layout Shift: 0.000

Send Feedback