Free Tool

Website Speed Checker

Core Web Vitals straight from Google's own testing engine — with the fixes ranked by how many milliseconds each one saves.

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Runs Google Lighthouse on their servers. Takes 20–40 seconds — that is Google's engine doing a full page load, not us being slow.

Whose numbers are these?

Google's, not ours. This runs their PageSpeed Insights engine and shows you exactly what it returns. There is no honest way to reproduce Core Web Vitals independently — anyone claiming their own scoring is guessing.

Lab score versus real visitors

The four big numbers are a lab test — one simulated load on a throttled connection. Useful, repeatable, and not what your visitors experience. If your site has enough traffic, Google also reports real Chrome user data, and that is the number that actually affects rankings. When it appears above, trust it over the lab score.

A word on chasing 100

Going from 45 to 85 is worth real money. Going from 92 to 100 usually is not. Past about 90 you start removing things visitors want to keep. Fix what is in the list above, then stop and go do something that earns.