What's quietly slowing your site down?
Some speed problems are visible in the markup before anything is measured: a script that blocks the parser, images with no reserved space that make the page jump, photos still served as JPEG. We find those. Read the note at the bottom about what this does and doesn't measure — it matters.
- 5
- business signals checked
- ≈10 sec
- typical scan
- $0
- to get started
Find the friction costing you customers
One URL. A clear score. Practical next steps.
No login. We only scan the public page you enter.
Read this before quoting the score. This check reads your HTML; it does not load your page, so it does not measure Core Web Vitals. It reports speed problems visible in the markup — render-blocking scripts, unsized images, legacy formats — which are causes of poor LCP and CLS, not the measurements themselves. Your real-world numbers depend on your server, your network and your visitors' devices. For measured Core Web Vitals, use Google PageSpeed Insights; a site can pass every check here and still be slow.