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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 Site Performance or... Test!


  • Repeat View
  • All test results are configured to be private by default.
  • seconds

Chrome-specific advanced settings:


Check out the documentation for more information on this feature

Simulate failure of specified domains. This is done by re-routing all requests for the domains to blackhole.webpagetest.org which will silently drop all requests.

See the documentation for details on how to specify custom metrics to be captured.

Real Experience

Test your user’s real experience with global locations, modern devices, and the latest browser versions.

Video Capture

Correlate your user’s visual experience to the technical measurements of your site.

In-Depth Metrics

Dive into the anatomy of your webpage with components like DNS, TCP, TLS, and more.

“One of the cool features of WebPageTest is that it can generate a filmstrip of screen snapshots taken during a web page load, enabling us to quantify how a page loads, visually. This view makes it significantly easier to determine how long the page is blank for, and how long it takes for the most important content to render.

Being able to look at the results in this way, provides the ability to empathise with the user.”

Andrew Galloni Engineering Director at Cloudflare

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