PageSpeed Checker
Understand how quickly a page loads and becomes usable, and which changes would make the biggest difference. Results focus on the metrics that affect real visitors.
Run a check
This tool isn’t available yet
PageSpeed Checker is still in development. The form below previews how it will work, but it can’t be submitted and no checks are run.
Results
Results aren’t available yet
Results will appear here once PageSpeed Checker launches.
How to use PageSpeed Checker
- Enter the full URL of the page you want to test.
- Run the analysis for mobile and desktop.
- Start with the opportunities that save the most time, then re-test to confirm the improvement.
What it checks
- Largest Contentful Paint (LCP)
- Interaction to Next Paint (INP)
- Cumulative Layout Shift (CLS)
- Render-blocking resources
- Image and asset optimisation opportunities
- Separate mobile and desktop results
Frequently asked questions
What are Core Web Vitals?
Core Web Vitals are Google’s user-experience metrics: Largest Contentful Paint for loading, Interaction to Next Paint for responsiveness and Cumulative Layout Shift for visual stability.
Why do my scores change between tests?
Lab tests are affected by network conditions, server response times and third-party scripts, so scores vary from run to run. Compare several runs rather than relying on one result.