PageSpeed Insights
Google tool for measuring page load performance and Core Web Vitals (LCP, INP, CLS) with both lab data and real-user field data from CrUX.
PageSpeed Insights analyzes page load performance using Lighthouse lab data and Chrome User Experience Report (CrUX) field data, reporting LCP, INP, CLS, FCP, and TTFB metrics. Recommendations are prioritized by potential impact on real-user experience.
A frontline tool for frontend developers and SEOs optimizing page speed. Run it before and after performance improvements, debug layout shifts causing poor CLS, identify render-blocking resources, and monitor real-user Core Web Vitals over time.
URL
https://pagespeed.web.dev/Recommended tools
Screaming Frog
Desktop SEO crawler that audits on-page elements, redirects, broken links, duplicate content, and hreflang, ideal for technical SEO audits.
AnswerThePublic
Search-listening tool that visualizes real questions people ask around a keyword, perfect for content ideation and FAQ research.
Semrush
All-in-one digital marketing platform covering SEO, PPC, content marketing, social media, and competitive research, enterprise-grade insights.