Analyze website page speed, response times, HTTP caching, compression, render-blocking resources, viewport setup, and Core Web Vitals status with honest diagnostic reporting.
Analyze website speed, TTFB latency, HTTP compression, caching headers, render-blocking JS/CSS resources, viewport setup, and Core Web Vitals status with honest diagnostic reporting.
Server-side analysis directly measures TTFB, compression, cache headers, and HTML payload size. Metrics requiring real human browser interactions are clearly labeled Unavailable or Estimated.
Enter any public website URL on the left to measure TTFB, HTTP compression, caching directives, render-blocking scripts, image optimizations, and Core Web Vitals status.
https://example.com
Evaluating TTFB, HTTP headers, DOM structure & render-blocking scripts...
Unable to connect to target URL.
Calculated from TTFB speed, compression, caching headers, render-blocking scripts, and mobile viewport setup.
Strictly categorized into Measured, Estimated, and Unavailable metrics.
Website speed and user experience metrics have become cornerstone ranking signals for search engines. Optimizing server latency, enabling HTTP compression, leveraging caching, and preventing layout shifts ensures your website loads instantly on both desktop and mobile devices.
LCP measures perceived loading speed. It marks the time when the largest main image or text block becomes visible in the viewport. To pass Core Web Vitals, LCP must occur within 2.5 seconds of page load.
INP assesses overall page responsiveness by measuring the latency of user interactions (clicks, taps, key presses). Pages should maintain an INP of 200 milliseconds or less to deliver a smooth user experience.
CLS quantifies visual stability by measuring unexpected layout shifts during page rendering. Prevent layout shifts by specifying explicit width and height attributes on images, ad slots, and embeds (target CLS score: ≤ 0.1).
First Contentful Paint (FCP) tracks the moment the browser renders the first DOM content (text, canvas, SVG). Time to First Byte (TTFB) measures server response latency. Fast server response times (< 800ms) directly improve downstream FCP and LCP scores.
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