NEW: Our Guide to Core Web Vitals, with Examples and Tips
Advanced Settings
Chrome-specific advanced settings:
Enter Script
Block Requests Containing (URL substrings)... Space-separated list
Block Domains (full host names)... Space-separated list of domains
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)...
Custom Metrics:
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 - EC2Beijing, 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)New York, NY - Android DevicesDulles, VA - Android Devices
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.
“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.”
“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.”
Learn why First Contentful Paint isn't exactly apples-to-apples from one browser to the next
Chris Coyier takes the API out for a spin and shares where he sees the most promise for developers
Check out a few examples of powerful custom metrics you can pull from WebPageTest
