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Core Web Vitals checker. Free, no signup.

Measure a page's loading speed and stability on mobile and see real-user Core Web Vitals when Google has them.

How to use it

  1. Paste the address of the page.
  2. We run a mobile lab test and read the real-user data.
  3. Start with the biggest opportunities in the list.
FAQ

Questions about the core web vitals checker.

What are Core Web Vitals?

Three measures of page experience: LCP (loading), INP (responsiveness) and CLS (visual stability).

Why is INP missing in the lab test?

INP needs real people interacting with the page, so it only comes from field data.

Why is there no field data?

Google only publishes real-user data for pages and sites with enough visitors.

What is a good score?

LCP under 2.5 s, INP under 200 ms and CLS under 0.1, measured at the 75th percentile.

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