performance · Free tool
PageSpeed Insights
Published by Google · Free · Official
Real-user field data and lab diagnostics for any URL — the Core Web Vitals numbers behind speed signals.
Why it matters
It combines real-world user measurements with lab audits, so you see both actual experience and fixable causes.
What it helps with
- Measuring LCP, INP and CLS for any public URL
- Prioritizing performance fixes by measured impact
Hosted by Google. Rankly describes this resource but does not reproduce its content.
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