Notice anything different? WebPageTest got all spiffed up. Read more about the changes and what's coming next!

Test. Optimize. Repeat!

Instantly test your site’s performance in real browsers, devices, and locations around the world.

screenshot of wpt results page

Start a Lighthouse or... Test!

Run Lighthouse on an emulated mobile device on a 3G network. Running the test will give you the top level scores for all the categories Lighthouse runs on, as well as individual level reports.