PageSpeed checker
Get mobile and desktop Lighthouse scores, Core Web Vitals and the top opportunities for any public URL, powered by Google PageSpeed Insights.
How it works
- 1
We call Google PageSpeed Insights
Two runs, mobile and desktop, using the official API.
- 2
We show the scores that matter
Performance, accessibility, best practices and SEO, plus LCP, CLS and TBT checked against Google's thresholds.
- 3
We add real-user data when it exists
If Google has enough traffic data for the URL we include the Chrome User Experience Report field results.
Why it matters for AI search
Slow pages are crawled less and abandoned more. Fast server response and light pages also make it cheaper for any crawler to read you fully.
Frequently asked questions
Why do my scores change between runs?
Lighthouse is a lab test. Network and server variance moves scores a few points. Results are cached for 24 hours so repeated checks stay consistent.
What is field data?
Measurements from real Chrome users over 28 days, shown only when Google has enough visits to the URL.
Which metrics are Core Web Vitals?
Largest Contentful Paint, Interaction to Next Paint and Cumulative Layout Shift. Lab tests show LCP and CLS plus Total Blocking Time as a stand-in for interactivity.
Can I test a page behind a login?
No. The page must be public.