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Core Web Vitals Checker

Run a full Google Lighthouse audit on any URL and see what real users feel — Largest Contentful Paint, Cumulative Layout Shift, Time to Interactive, plus the loading filmstrip frame-by-frame and the top opportunities to fix. The same metrics PageSpeed Insights uses for your search ranking.

We'll run a full Google Lighthouse audit and report Core Web Vitals + the loading filmstrip. Takes 20-40 seconds.

Desktop simulates a wired connection; mobile applies CPU + network throttling.

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Monitor this 24/7 — get alerts on the first failure.

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Only run these tools against systems you own or are authorized to test. Using them to scan or probe systems without permission violates our Terms.

About Core Web Vitals Checker

Run a full Google Lighthouse audit on any URL and see what real users feel — Largest Contentful Paint, Cumulative Layout Shift, Time to Interactive, plus the loading filmstrip frame-by-frame and the top opportunities to fix. The same metrics PageSpeed Insights uses for your search ranking. Detailed documentation for this tool is in the works — until then, run it above to see what it returns or check the related tools below.