Test your website’s Core Web Vitals performance. Enter your URL and get scores for LCP, CLS, and INP , the three metrics Google uses to measure page experience.
Enter your URL and we’ll run a full Core Web Vitals assessment. You’ll get scores for LCP, CLS, INP, plus specific recommendations for improvement.
Provide any page URL , your homepage, a product page, or a blog post. We test the exact page you specify.
We run your page through Lighthouse and CrUX data to measure real-world and lab performance across all Core Web Vitals.
Receive a detailed speed report with pass/fail status for each metric, performance scores, and prioritized recommendations.
Measures how fast the main content of your page loads. Google considers LCP under 2.5 seconds as “good.” Anything over 4 seconds is “poor.” This is the single most impactful speed metric for user experience.
Measures visual stability , how much your page layout shifts while loading. A CLS score under 0.1 is “good.” High CLS means elements jumping around as the page loads, frustrating users and potentially causing mis-clicks.
Measures responsiveness , how fast your page responds when a user clicks, taps, or types. INP under 200ms is “good.” This replaced FID (First Input Delay) in March 2024 as a Core Web Vital.
Not just scores , specific fixes. Which images need compression, which scripts are blocking render, which CSS is unused. Prioritized by impact so you know where to start.
Website speed isn’t a technical nicety , it’s a business metric. Research from Google shows that as page load time increases from 1 second to 3 seconds, the probability of bounce increases by 32%. At 5 seconds, it’s 90%. Every second your page takes to load costs you visitors, leads, and sales.
Since 2021, Google has used Core Web Vitals as ranking signals. Pages that pass all three CWV thresholds (LCP, CLS, INP) get a ranking boost compared to pages that don’t. It’s not the biggest ranking factor , content relevance and backlinks still matter more , but in competitive SERPs where multiple pages are equally relevant, speed can be the tiebreaker.
Beyond rankings, speed affects conversion rates directly. Amazon famously found that every 100ms of additional load time reduced sales by 1%. Shopify merchants report 1.3x higher conversion rates when their store loads in under 2 seconds versus over 4 seconds. Fast pages make more money. It’s that straightforward.
| Metric | Good | Needs Work | Poor |
|---|---|---|---|
| LCP | Under 2.5s | 2.5s – 4.0s | Over 4.0s |
| CLS | Under 0.1 | 0.1 – 0.25 | Over 0.25 |
| INP | Under 200ms | 200ms – 500ms | Over 500ms |
This free tool tests one page at a time. Our full Technical SEO audit tests every important page on your site, identifies the specific code and server issues causing slowdowns, and delivers a prioritized fix list with estimated impact for each item. We also implement the fixes if you need us to.
Lab data (Lighthouse) tests your page under controlled conditions , a simulated device and network. Field data (CrUX) shows how real users actually experience your page. Google uses field data for ranking signals. Lab data is useful for debugging specific issues. Both matter.
Yes. Google confirmed Core Web Vitals as ranking signals in 2021. Pages that pass all three CWV thresholds get a ranking advantage. It’s a tiebreaker factor , content relevance and authority still matter more, but in competitive SERPs, speed can determine who ranks higher.
The most common causes are unoptimized images (oversized files served without compression or modern formats), render-blocking JavaScript and CSS, slow server response times (TTFB), too many third-party scripts (analytics, chat widgets, ad trackers), and missing browser caching. Most sites have 3-5 of these issues simultaneously.
Aim for all three Core Web Vitals in the “good” range: LCP under 2.5 seconds, CLS under 0.1, and INP under 200ms. For a Lighthouse Performance score, 90+ is excellent, 50-89 needs work, and below 50 is poor. Most business sites score between 40-70 without optimization.
Speed is just one part of technical SEO. We audit, fix, and optimize the entire technical foundation , so your content has the best possible chance to rank.