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

Menu:

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 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.