Core Web Vitals Checker | Page Speed Analysis
Free Core Web Vitals tool. Analyze LCP, CLS, and INP scores for any URL and get actionable recommendations to improve page speed and SEO rankings.
Get Started →The Core Web Vitals Checker analyzes the three user-experience signals Google uses as ranking factors: Largest Contentful Paint, Interaction to Next Paint, and Cumulative Layout Shift. Enter any URL to see how the page performs against Google thresholds and get prioritized recommendations for improving load speed, responsiveness, and visual stability.
Largest Contentful Paint measures loading performance and should occur within 2.5 seconds of the page starting to load. Interaction to Next Paint measures responsiveness and should stay under 200 milliseconds; it replaced First Input Delay as a Core Web Vital in March 2024. Cumulative Layout Shift measures visual stability and should stay below 0.1. Passing all three signals contributes to both rankings and conversion rate, since faster, more stable pages convert better.
The tool identifies which vital is failing and points to the common causes: oversized images and render-blocking resources for slow paint, heavy JavaScript execution for poor responsiveness, and unsized media or injected content for layout shift. Core Web Vitals are one input in the broader technical SEO picture, alongside crawlability, indexation, and structured data.
Good Core Web Vitals are a Largest Contentful Paint under 2.5 seconds, an Interaction to Next Paint under 200 milliseconds, and a Cumulative Layout Shift under 0.1. Google considers a page to pass when at least 75 percent of visits meet all three thresholds.
Yes. Core Web Vitals are part of Google page-experience signals and act as a ranking factor, most noticeably as a tiebreaker between pages of similar relevance. They also affect conversion rate, so improving them benefits both rankings and revenue.
Interaction to Next Paint replaced First Input Delay as a Core Web Vital in March 2024. INP measures overall page responsiveness across all interactions rather than only the first, and the target is under 200 milliseconds.
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