⚡ Free SEO Tool

Speed & Structure Checker

Check your website's performance score, Core Web Vitals, accessibility, and SEO health — powered by Google PageSpeed Insights.

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Powered by Google PageSpeed Insights API · Results may take 15–30 seconds

⚙️ One-time setup required

This tool needs a free Google PageSpeed Insights API key. No credit card — just a Google account.

1Go to console.cloud.google.com/apis/credentials and create an API key
2Enable the PageSpeed Insights API at APIs & Services → Library
3Open pagespeed.php and replace YOUR_GOOGLE_API_KEY_HERE with your key
4Upload pagespeed.php to rankalseo.com/tools/ and you're done
Analyzing…
Sending URL to Google PageSpeed
Running Lighthouse audit
Collecting Core Web Vitals
Building your report
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This tool runs a full Google Lighthouse audit on any public webpage and returns performance scores, Core Web Vitals, accessibility issues, and actionable improvements.

What we check

Core Web Vitals

LCP (Largest Contentful Paint), FID/INP (Interaction to Next Paint), CLS (Cumulative Layout Shift), FCP (First Contentful Paint), and TTFB (Time to First Byte) — Google's official ranking signals since 2021.

Performance score

A 0–100 Lighthouse score measuring load speed, interactivity, and visual stability. 90+ is Good, 50–89 is Needs Improvement, below 50 is Poor. Mobile and desktop scores differ significantly.

SEO & Accessibility

Checks for meta tags, crawlability, structured data, HTTPS, tap target sizes, color contrast, ARIA labels, and 60+ other technical checks that affect both search rankings and user experience.