Core Web Vitals Checker: Find and Fix What Slows Your Site
Enter your URL and get your LCP, INP, and CLS scores in seconds, plus clear recommendations to fix the issues that hurt your rankings.
5 credits per run. 20 free credits when you sign up, no credit card required.
example.com
ExampleCore Web Vitals Checker: 2 warnings, 0 errors
- HTTPSEnforced
- robots.txtFound
- XML sitemap12 broken URLs
- Render-blocking scripts3 found
Example result with sample data. Yours uses live data for your inputs.
How it works
From your input to a prioritised list of fixes in under a minute.
- Step 1
Enter your details
Your website, business or the item you want checked. Nothing to install.
- Step 2
We run live checks
Brainito fetches live data and tests it against the rules that matter.
- Step 3
Fix what matters first
Clear results with what to fix, in order of impact, and where to go next.
What you get
What the result tells you, and why it is worth the minute it takes.
See Your Scores Instantly
Get LCP, INP, and CLS results for any page in seconds, with clear pass or fail status for each metric.
Know Exactly What to Fix
Every issue comes with a plain-English recommendation, so you know what to change and why it matters for rankings.
Protect Your Google Rankings
Core Web Vitals are a Google ranking signal in 2026. Catch slow pages before they cost you traffic and conversions.
The guide
What the core web vitals checker does, how to use it, and what to do with the result.
A Core Web Vitals checker measures the three Google metrics that define real user experience: Largest Contentful Paint, Interaction to Next Paint, and Cumulative Layout Shift. You enter a page URL and see how loading, responsiveness, and visual stability score against Google thresholds. It turns abstract performance advice into concrete numbers you can track and improve page by page.
What Core Web Vitals metrics this tool checks
The checker reports each of the three Core Web Vitals with its measured value and pass or fail status. Largest Contentful Paint tracks how long the main content takes to render, Interaction to Next Paint captures responsiveness to clicks and taps, and Cumulative Layout Shift scores how much the layout jumps while loading. Where available, it distinguishes field data from real visitors and lab data from a controlled test, so you can tell whether a lab warning matches real-world behavior. Seeing all three together shows which specific dimension of experience is holding a page back rather than a single blended score.
How to fix failing Core Web Vitals scores
Match each failing metric to its usual cause. Slow Largest Contentful Paint often traces to heavy images, render-blocking scripts, or a sluggish server response, so compress media, preload the hero image, and defer noncritical code. Poor Interaction to Next Paint points to long JavaScript tasks, which you break up or move off the main thread. Layout shift comes from images and embeds without reserved dimensions, so set width and height and avoid inserting content above existing elements. Fix one metric at a time, then recheck to confirm the change moved the number in the right direction across both field and lab data.
Why Core Web Vitals matter for rankings
Core Web Vitals are a confirmed Google ranking signal and part of the page experience report, so weak scores can hold back pages that are otherwise well optimized. Beyond rankings, these metrics track how frustrating a page feels, and slow or unstable layouts push visitors to leave before converting. Because Google leans on field data from real Chrome users, sustained improvements matter more than one-off lab wins. Monitoring these numbers after every release catches regressions early, protects the experience you have already earned, and keeps technical performance from quietly undoing your content and link efforts.
Frequently asked questions
Something else? Email support@brainito.com
What are Core Web Vitals and why do they matter?
Core Web Vitals are three metrics Google uses to measure page experience: LCP for loading, INP for interactivity, and CLS for visual stability. They influence rankings, so poor scores can hold back otherwise strong pages.
Is the Core Web Vitals Checker free to use?
It is free to try. Every new Brainito account comes with 20 free credits, and each run costs 5 credits. You get full results with recommendations, not a locked preview, and there is no credit card required.
How do I fix a failing Core Web Vitals score?
Start with the recommendations in your report. Common fixes include compressing images, reducing JavaScript, setting size attributes on media, and using faster hosting or a CDN. Rerun the check after each change to confirm improvement.
Where to go from here
The core web vitals checker answers one question. These are the next ones worth asking.
See exactly what slows your site down. Get the report in seconds.
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- 20 free credits when you sign up
- 5 credits per run
- No credit card required