Server-side proxy estimates for WordPress LCP, CLS, and INP — correlated with detected performance issues so you know exactly what to fix first.
Core Web Vitals are Google's primary page experience signals and they directly affect WordPress search rankings. While browser-based tools measure them in real browsers, WP Health Inspector estimates them from server-side signals: asset weight, TTFB indicators, external dependency latency, and hook complexity. The result is actionable diagnostic data tied directly to the WordPress issues already surfaced by other modules — so you know exactly what to fix and why.
Estimates WordPress LCP from server-side signals including total asset weight, TTFB indicators, render-blocking script count, and image optimisation state. Color-coded Good / Needs Work / Poor with a breakdown of which signals are contributing to a poor LCP estimate.
Estimates WordPress CLS risk from images without explicit dimensions, late-loading web fonts, and dynamically injected content patterns detected in enqueued assets. Flags specific contributing factors with actionable recommendations.
Estimates WordPress INP from hook complexity, JavaScript payload weight, and the presence of long-running synchronous scripts. Identifies the most likely contributors to poor INP with specific asset and hook references.
Each WordPress Core Web Vitals estimate is directly linked to findings from other modules. A poor LCP estimate references the Asset Inspector's heaviest scripts. A poor INP estimate references the Hook Inspector's most expensive callbacks.
Each CWV metric is rated using Google's published thresholds — mirroring what you'd see in PageSpeed Insights but with server-side WordPress attribution data you can act on immediately.
No — these are server-side proxy estimates, not real browser measurements. They identify the most likely server-side WordPress contributors to poor CWV scores. For final CWV verification, use PageSpeed Insights or the Chrome UX Report.
Server-side estimates run instantly, require no external service, work on WordPress staging environments, and provide WordPress-specific attribution data that browser tools cannot provide.
LCP draws from Asset Inspector and External Dependency Monitor. CLS draws from Asset Inspector (font loading patterns). INP draws from the Hook Inspector (callback complexity) and Asset Inspector (JavaScript weight).
No. Core Web Vitals Estimation is a Pro-exclusive module.
Server-side attribution for Google's WordPress page experience signals — tied directly to your configuration.
Core Web Vitals Estimation is included in every Pro plan alongside all seventeen diagnostic modules.
Download Lite to get started with the nine core WordPress diagnostic modules — completely free.
