WebPageTest
WebPageTest is an advanced web performance measurement tool that allows developers and performance engineers to test, analyze, and optimize website speed, Core Web Vitals, and frontend loading behavior. It runs tests across real mobile and desktop devices, various browsers, and global testing locations under different network conditions. Features include detailed waterfall charts, Lighthouse integration, filmstrip views, video metrics, custom scripting, and carbon usage tracking to identify bottlenecks and improve application delivery.
Checked on Oct 19, 2026.
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