Quick Summary
Core Web Vitals are Google's metrics for user experience. A good website speed test should show an LCP under 2.5s, a CLS under 0.1, and an FID under 100ms. Use our free checker to analyze these metrics instantly and improve your SEO ranking.
How to Use Our Core Web Vitals Checker
To check your website's speed, simply enter your URL in the search box above and click "Analyze Speed." Our tool runs a mobile Lighthouse audit via Google's API to instantly generate a report.
- Enter your URL: Type your website address (e.g., yourwebsite.com) into the search bar above.
- Click Analyze: Hit the blue "Analyze Speed" button to trigger the API request.
- Wait for results: It takes about 10 to 15 seconds to run a full mobile audit.
- Review your scores: Check the Performance gauge and the 3 Core Web Vitals below it.
What Do These Metrics Mean?
Our tool provides two main types of data: Core Web Vitals (LCP, CLS, FID) which measure real user experience, and Lighthouse scores (Performance, Accessibility, SEO) which test technical health.
Core Web Vitals (Google's Ranking Factors)
| Metric | What it Measures | Good Score |
|---|---|---|
| LCP | Loading speed (when main content appears) | Under 2.5s |
| CLS | Visual stability (elements jumping around) | Under 0.1 |
| FID | Interactivity (time to respond to a click) | Under 100ms |
How to Fix a Slow Website (Actionable Tips)
To fix a slow website and improve your Core Web Vitals, you must optimize images, enable browser caching, minify CSS and JavaScript, and upgrade your web hosting. Implementing these technical fixes directly improves your user experience and Google search rankings.
- Optimize Images: Compress images (use WebP format) before uploading them. Don't upload 4MB images.
- Enable Caching: Use a caching plugin (like WP Rocket or LiteSpeed Cache) if you are on WordPress.
- Minify Code: Remove unnecessary spaces from your CSS and JavaScript files.
- Upgrade Hosting: Cheap shared hosting is often slow. Consider upgrading to a VPS or managed hosting.
Want to check your competitor's speed? Just enter their URL above! Also, try our Backlink Checker to see their link profile.
Who is This Tool For?
- SEO Professionals: Auditing client websites to ensure they meet Google's page experience signals.
- Web Developers: Testing the impact of new features or code deployments on site speed.
- Bloggers & Marketers: Ensuring their content loads fast to reduce bounce rates and keep readers engaged.
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Our Data Source & Methodology
We use the official Google PageSpeed Insights API to fetch performance data. This is the exact same data Google uses when evaluating your website for Core Web Vitals.
Limitations: The data shown is Lab Data (simulated mobile test). It may differ slightly from Field Data (real user metrics in Google Search Console) due to real-world network conditions.
Written and reviewed by: Habib Ur Rehman, Full-Stack Web Developer & SEO Specialist.
Last Updated: October 25, 2026.
Frequently Asked Questions
What is a good PageSpeed score?
A score of 90-100 is considered Good (Green), 50-89 needs improvement (Orange), and 0-49 is Poor (Red).
Why is my Desktop score high but Mobile score low?
Mobile devices have slower processors. Google uses "Mobile-First Indexing," so your mobile score is the most important one for SEO.
Is this tool free?
Yes, 100% free. We use Google's official API and don't charge you anything. No login required.