Measure how quickly your website loads and learn how to make it faster.

Identify page elements that cause high Interaction to Next Paint.

See how quickly your website loads on a range of different network connection speeds.

Check if browser resource hints like preconnect and preload are working correctly.

View web vitals metrics, quickly access testing tools, and see observed metrics on PageSpeed Insights.

Measure your Time to First Byte from 10 global test locations.

Test your website without JavaScript enabled.

Test the size of your HTML document and identify bloat like inline images or large hydration state.

Break down and optimize the size of your JSON responses.

Identify long selectors or embedded base64 images.

Compare the size of two JSON responses in depth.

Generate an Authorization header from username and password.

Crawl a website and find a random page on it.