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Core Web Vitals & Lighthouse Analyzer

Analyze a public URL or imported Lighthouse reports, review LCP, INP and CLS thresholds, inspect lab opportunities and compare releases without mixing field and lab data.

Explicit data sources
URL mode sends the page URL to Google PageSpeed Insights. ToolRen validates public targets and never exposes the server API key.

About Core Web Vitals & Lighthouse Analyzer

Separate real-user experience from reproducible lab diagnostics. Analyze a public URL or imported Lighthouse reports, review LCP, INP and CLS thresholds, inspect lab opportunities and compare releases without mixing field and lab data.

Key capabilities

  • Keep CrUX field data and Lighthouse lab measurements in separate evidence sections
  • Assess LCP, INP and CLS against current Core Web Vitals thresholds
  • Prioritize Lighthouse opportunities and diagnostics by potential saving
  • Compare two imported reports metric by metric

Useful for

  • Review a public page before and after release
  • Find likely loading, rendering and main-thread bottlenecks
  • Compare saved Lighthouse results during an investigation

Frequently asked questions

Is Core Web Vitals & Lighthouse Analyzer free to use online?

Yes. Core Web Vitals & Lighthouse Analyzer opens in a modern browser and does not require desktop software installation.

What is Core Web Vitals & Lighthouse Analyzer useful for?

Common use cases include Review a public page before and after release; Find likely loading, rendering and main-thread bottlenecks.

Does this tool make network connections?

Some Core Web Vitals & Lighthouse Analyzer features need to connect to a target service or load online data. Follow the page guidance and access only resources you are authorized to use.

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