Free — real Google data — up to 60 seconds
What real visitors experienced, Google's lab diagnostics, search basics, tracking health — and the top fixes, honestly labelled.
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CrUX + lab data · up to 60 seconds for heavy sitesReal-visitor data: Google CrUX, 28-day window. Lab data: a single simulated Lighthouse run from a Google server — directional, not gospel. Tags marked "~" load through systems this free check can't execute; the deep-dive verifies them by hand.