UX Performance & Page Speed

Measure critical User Experience metrics including Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), and First Input Delay (FID).

What are Core Web Vitals?

Core Web Vitals are a set of specific factors that Google considers important in a webpage's overall user experience. High scores in these metrics are crucial for both SEO and user retention.


Largest Contentful Paint (LCP): measures loading performance. To provide a good user experience, LCP should occur within 2.5 seconds of when the page first starts loading.
Cumulative Layout Shift (CLS): measures visual stability. To provide a good user experience, pages should maintain a CLS of less than 0.1.

? How to Use Core Web Vitals & Speed Lab | Web Infra Lab

  1. Open the networking tool in your browser.
  2. Enter the IP address, domain, subnet, or network data.
  3. Select the calculation or lookup type you need.
  4. Click the action button to get instant results.
  5. Copy or export the network information for your records.

✓ Why Use This Tool

  • 100% Free — No account, subscription, or payment required.
  • Privacy First — All processing happens in your browser. Your files never leave your device.
  • No Installation — Works directly in any modern browser on any device.
  • Instant Results — Get your output in seconds without waiting for server processing.

Frequently Asked Questions

Can I use these networking tools without installing any software?

Yes. All IT and networking tools run directly in your browser. There is nothing to install, no configuration required, and they work on any operating system.

How accurate is the network diagnostic information?

The tools query live DNS resolvers and use your browser's network APIs for real-time data. Results reflect your actual network conditions at the time of the query.

Can IT professionals use these tools for client network diagnostics?

Yes. These tools are designed for professional use and provide accurate, real-time network information suitable for diagnosing DNS misconfigurations, IP conflicts, and connectivity issues.