Website Speed Checker

Run a Google PageSpeed Insights test for mobile and desktop at once and see your Core Web Vitals in plain English.

Mobile + desktop
Fast results
100% free
No signup

How it works

How to use the website speed checker

1
Enter a URL
Paste the full address of the page you want to test.
2
Google tests it
PageSpeed Insights loads the page on a simulated mobile and desktop device (about 20–40 seconds).
3
Fix what matters
Focus on metrics marked red or orange first — they hurt users and rankings most.

What the scores mean

The performance score (0–100) comes from Lighthouse, Google's lab testing tool. 90–100 is good, 50–89 needs improvement and below 50 is poor. Mobile scores are almost always lower because the test simulates a mid-range phone on a slower connection.

Core Web Vitals

Largest Contentful Paint (LCP) — how quickly the main content appears. Good: 2.5 seconds or less.
Interaction to Next Paint (INP) — how quickly the page responds to taps and clicks. Good: 200 ms or less.
Cumulative Layout Shift (CLS) — how much the layout jumps around while loading. Good: 0.1 or less.

When enough Chrome users have visited a page, Google also reports real-user (field) data from the Chrome UX Report. Field data is what Google uses for its page experience signals, so it carries more weight than the lab score.

FAQ