Run one desktop Lighthouse lab analysis through Google PageSpeed Insights. Review loading metrics, selected opportunities, and diagnostics.
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It requests a desktop PageSpeed Insights Lighthouse run for one URL and displays the Lighthouse performance score, lab LCP and CLS, Maximum Potential First Input Delay, FCP, Speed Index, Time to Interactive, Total Blocking Time, and selected audits.
Yes, when Google has enough real-user data. Alongside the Lighthouse lab run it shows Chrome UX Report field Core Web Vitals — real-user LCP, INP, and CLS over roughly 28 days, for this page and its origin, in a fast/average/slow bucket kept distinct from the lab metrics. When the URL or origin has too little real-user traffic, it states that field data is unavailable rather than showing a pass or fail. Field data is what Google Search uses for the page-experience signal.
Yes. The performance endpoint requires a signed-in account. Requests are limited to two per minute, and Google PageSpeed availability and quotas can also affect completion.
No. Each run analyzes the single submitted URL using the desktop strategy. Test representative templates and important journeys separately, then compare results under consistent conditions.
Lighthouse considers 90–100 good, 50–89 needs improvement, and 0–49 poor for that lab run. The score can vary with test conditions and does not certify real-user experience, search rankings, conversions, or the whole site.
No. Lighthouse estimates potential lab savings for selected audits. Confirm the affected resources and critical path, assess implementation risk, test the change, and compare repeated lab runs plus field data.
Accessibility
Automated accessibility checks with WCAG-mapped findings and manual-test guidance
Mobile UX
Review crawl-captured text, markup cues, image records, links, headings, and fetch timing for mobile follow-up
Landing Page
Review crawl-visible headings, action wording, metadata, and media
Technical SEO Signals
Review crawl-captured metadata, directives, URL patterns, statuses, links, and JSON-LD presence
This tool requests one desktop Lighthouse performance run through Google PageSpeed Insights. It displays the lab performance score, LCP, CLS, Maximum Potential First Input Delay, FCP, Speed Index, Time to Interactive, Total Blocking Time, and selected Lighthouse opportunities and diagnostics. It does not crawl the site or display field INP or CrUX data.
A Lighthouse run is useful for reproducing a page load in a controlled environment and opening diagnostics. Field data describes eligible real visits across devices, networks, geographies, cache states, and interactions. Compare both sources: investigate important field problems with traces, and verify lab improvements against real-user experience and the business outcomes that matter to the page.
Lighthouse opportunities estimate potential savings for that synthetic run. Open the underlying audit, confirm which resources and work are involved, and assess dependencies before implementation. Repeat the test under comparable conditions, check visual and functional behavior, and watch field metrics after release. The displayed estimates are diagnostic inputs, not guaranteed gains or fixed implementation scopes.