Measure page quality

Test your pages in a lab environment powered by PageSpeed Insights. Then get tips and recommendations to improve your user experience. For field performance, see the PageSpeed Insights tool.

Run tests on your site

Enter your site's URL to see how well it performs across all audits.

Look at what matters

See your site's performance across the areas you care about.

Get tips for improving

Each test comes with helpful steps to improve your site's results.

How your site is measured

When you measure your site, web.dev uses Lighthouse, an open-source, automated tool for improving the quality of web pages. Lighthouse will audit your site in the following categories:

What is the data source powering the web.dev/measure tool?

web.dev/measure uses Lighthouse data from the PageSpeed Insights API. Learn more about PageSpeed Insights in the official FAQs

How does web.dev/measure differ from PageSpeed Insights?

web.dev/measure measures the overall quality of a web page in a lab environment (using Lighthouse). It gives insights about multiple quality categories from Lighthouse, including Performance, Accessibility and SEO. PageSpeed Insights (PSI) is performance focused, using both lab (Lighthouse) and field (Chrome UX Report) data to provide a summary of performance. Furthermore, PSI provides origin level insights in the field, whereas web.dev/measure is intended to deep-dive into a single URL in the lab.

Use PSI when you want to measure and optimize your Core Web Vitals, and use web.dev/measure when optimizing a broader set of quality signals about a page.