How to use the Page Speed Test
- Type the full page address, for example https://example.com.
- Choose Mobile phone or Desktop computer. Mobile is the one Google uses first.
- Click Test Speed and wait 15 to 40 seconds while Google tests your page.
- Read your performance score and the Core Web Vitals.
- Work through the What to fix list from the top. The biggest time savings come first.
Features
- Performance, Accessibility, Best Practices and SEO scores from Google Lighthouse.
- Core metrics: First Contentful Paint, Largest Contentful Paint, Total Blocking Time, Layout Shift and more.
- Real user data (Chrome UX Report) when Google has enough visits for your page.
- Page screenshot and a priority list of fixes with the time or size they could save.
- Test as a mobile phone or a desktop computer.
- Free. Open the full report on Google with one click.
Core Web Vitals explained
- Largest Contentful Paint (LCP): how fast the main content shows. Good: under 2.5 seconds.
- Interaction to Next Paint (INP): how quickly the page reacts to taps and clicks. Good: under 200 ms.
- Cumulative Layout Shift (CLS): how much the layout jumps. Good: under 0.1.
Frequently Asked Questions
Why does my mobile score look lower than desktop?
The mobile test uses a slower phone and a slower network, so it is stricter. Google uses mobile-first indexing, so treat the mobile score as the main one.
Why does the score change between tests?
Server load, network and third-party scripts change from moment to moment. Run the test two or three times and look at the trend.
I see a message about a quota. What should I do?
The free Google service limits how many tests can run each minute for everyone. Wait a minute and try again. You can also paste your own free Google API key into the optional box.
What is a good score?
90 to 100 is good, 50 to 89 needs improvement and below 50 is poor.
Why is there no real user data?
Google shows real user data only for pages with enough Chrome visits. New or small sites often have none. The lab test still works.
How can I make my site faster?
Compress and resize images, use modern formats like WebP, turn on caching and compression, remove unused scripts and use a CDN.