Fetch & measure
Time to first byte, HTML download, and linked JS/CSS/image responses.
Performance
Enter a URL. We fetch the page, measure response times and transfer size, audit render-blocking assets, and rate performance, accessibility, best practices, and SEO from 1–10.
Checks run from this server over HTTP — no browser or third-party API required. Only analyze sites you own or are authorized to test.
How it works
Remote HTTP analysis — no Google API, no headless browser.
Time to first byte, HTML download, and linked JS/CSS/image responses.
Scripts and stylesheets in <head> without defer, async, or print media.
Performance, accessibility, best practices, and SEO scored 1–10 from HTML and headers.
Compression, caching, large assets, mixed content, and request count.