Free tool
Real-world speed
Google measures how fast your pages feel for real Chrome visitors: display, response to clicks, stability. These Core Web Vitals count in its ranking. We fetch them for you, on phones and computers.
The three signals Google uses
LCP
Display
The main content should show within 2.5 seconds.
Poor beyond 4 seconds.
INP
Response
The page should react to a click within 200 milliseconds.
Poor beyond half a second.
CLS
Stability
Content should not jump: 0.1 or less.
Poor beyond 0.25.
Questions
Why “no data”?
Google only publishes these measurements for sites with enough Chrome visits. For a smaller site, we run a simulated test instead.
Why 75% of visits?
That's Google's rule: a page passes if at least 3 visits out of 4 are good. It covers slow phones and weak networks, not just the lucky ones.
Frequently asked questions
Is my site fast for real visitors?
The tool fetches Google's measurements from real Chrome visitors: display, response to clicks and stability. These Core Web Vitals count in its ranking, on phones and on computers.
What do LCP, INP and CLS mean?
LCP measures how fast the main content shows (2.5 seconds or less), INP the response to a click (200 milliseconds or less) and CLS the page's stability (0.1 or less).
Why does it say "no data"?
Google only publishes these measurements for sites that get enough Chrome visits. For a smaller site, we run a simulated test instead of using real-visitor data.
Why 75% of visits?
That is Google's rule: a page passes if at least 3 visits out of 4 are good. It covers slow phones and weak networks, not just the lucky ones.
