LIVE DIAGNOSTIC
Page Speed Scanner
Send a real network request, capture server response time, payload weight, and headers. Perfect for quick launch checks or weekly performance rituals—no external accounts required.
Send a real network request, capture server response time, payload weight, and headers. Perfect for quick launch checks or weekly performance rituals—no external accounts required.
A page speed test measures how quickly a web page responds and how heavy it is to load. This tool fires a real HTTP request to the URL you provide, captures time to first byte, total response time, payload size, and HTTP headers. Faster pages convert better, rank higher in search, and cost less in mobile data, which is why speed is treated as a Core Web Vital.
Paste the full URL including https. The test runs against the live server, so make sure the page is publicly reachable.
The tool fetches the page once and records timing, payload weight, and response headers.
Time to first byte under 200 ms is excellent, under 600 ms is acceptable. Above that suggests slow origin or missing caching.
Pages over 1 MB on the initial response often need image compression or code splitting.
Look for Cache-Control, Content-Encoding (br or gzip), and HTTP status. Missing compression is a common easy win.
No. Google PageSpeed Insights uses Lighthouse to score rendering performance and Core Web Vitals. This tool measures raw server response, which is one input into those scores.
Under 200 ms is fast, 200 to 600 ms is acceptable, above 600 ms usually means the server or upstream caching needs work.
Most often: uncompressed images, no CDN, no Brotli or gzip, blocking third-party scripts, or a slow origin server. Start by checking payload size and Content-Encoding headers.
This test measures the raw HTTP response, which is the same regardless of device. For device-specific rendering performance, run Lighthouse in Chrome DevTools or PageSpeed Insights.
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