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Paste a URL to see its real performance score and Core Web Vitals, powered by Google's own PageSpeed Insights (Lighthouse) data — not an estimate.
GOOGLE_PAGESPEED_API_KEY to your .env file (see .env.example for how to get one for free).
It runs Google's own PageSpeed Insights analysis (the same engine behind Lighthouse and Chrome DevTools) on a page and reports a 0-100 performance score, along with Core Web Vitals — the specific loading, interactivity, and visual-stability metrics Google uses to judge real-world page experience.
Page speed affects both user experience and search ranking. This gives you Google's own assessment, directly, so you're seeing the same data Google itself uses rather than a third-party guess.
Paste a public page URL, choose Mobile or Desktop, and click "Check Speed." Mobile results are usually lower than desktop since mobile devices and connections are slower — both are normal to check since Google evaluates mobile performance primarily.
Scores of 90+ are considered good, 50-89 need improvement, and below 50 are poor — these are Google's own published thresholds, not ours. The "Top Opportunities" list highlights the specific issues Lighthouse flagged as having the biggest potential impact.
Results reflect a single test run under Google's lab conditions, which can vary slightly between runs. This tool shows lab data (a simulated test), not field data from real visitors over time — for that, Google's own Search Console reports actual Core Web Vitals from real users.
Mobile tests simulate a slower device and network connection by design, since that reflects how many real visitors experience your site. It's normal for mobile scores to be lower.
It calls Google's own PageSpeed Insights API directly — the results are Google's real Lighthouse analysis, not an estimate made by klikwit.
A specific set of metrics Google uses to measure real-world page experience: loading speed (LCP), visual stability (CLS), and responsiveness (related to TBT/INP).
Google runs a full page load simulation for every request, which can take 10-20 seconds depending on the page and current load on Google's service.
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