Platform WebPageTest
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WebPageTest. The gold standard in web performance testing.
Online CourseLearn to analyze performance, fix issues, and deliver fast websites from the start.
New in WebPageTest! Measure your site's carbon footprint and run No-Code Experiments to find ways to improve.
All of the WebPageTest features you already love, plus API Access & No-Code Experiments!
Enter Script (or read it from a text file)
Block Requests Containing (URL substrings)... Space-separated list (type in or read from a text file)
Block Domains (full host names)... Space-separated list of domains (type in or read from a text file)
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.
Hosts to fail (one host per line)... Type in or read from a text file
Custom Metrics: Type in or read from a text file
Virginia - EC2Salt Lake City, Utah - GCECalifornia - EC2Toronto, Canada - EC2Sao Paulo, Brazil - EC2Ireland - EC2London, UK - EC2Paris - EC2Amsterdam, NL - GCEFrankfurt, Germany - EC2Milan, Italy - EC2Stockholm, Sweden - EC2Cape Town, South Africa - EC2Bahrain - EC2Dubai, UAE - AzureMumbai, India - EC2Bangkok, Thailand - TencentSingapore - EC2Jakarta, Indonesia - GCEHong Kong, China - EC2Shanghai, China - TencentBeijing, China - TencentNingxia, China - EC2Taiwan - GCESeoul, Korea - EC2Tokyo, Japan - EC2Osaka, Japan - EC2Sydney, Australia - EC2Melbourne, Australia - AzureLos Angeles, CA - M1 Mac Mini/iOS (Chrome,Firefox,Safari)New York, NY - M1 Mac Mini/iOS (Chrome,Firefox,Safari)
“Experiments are a game changer for quantifying the speed impact of performance optimizations. What took days of technical work is now just a few clicks. Not only will this save tons of time, it will let us test and iterate ideas to find the right mix of recommendations efficiently.I’m blown away this exists, it feels like magic.”
Test your user’s real experience with global locations, modern devices, and the latest browser versions.
Correlate your user’s visual experience to the technical measurements of your site.
Dive into the anatomy of your webpage with components like DNS, TCP, TLS, and more.
See how data supports the idea that we can influence a healthier approach to performance testing through our product decisions.
Introducing a new WebPageTest experiment type
What changed between the page's HTML as sent by the server over the network and the HTML that the browser finally used to render the page when the test was complete?