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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
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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.

“Snyk uses WebPageTest to perform 3rd party library detection and vulnerability scanning that reveals potential security vulnerabilities in your website pages.”

Liran Tal Developer Relations at Snyk

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