What metrics does the WordPress Speed Self-Check measure?

TTFB, LCP, CLS, total blocking time, request count, page weight and DOM node count — each graded against Core Web Vitals thresholds with a specific fix hint.

Yes. The self-check runs entirely in your browser, needs no signup and costs nothing.

Will my site data be sent to your server?

No. All measurements run locally in your browser; nothing about your site leaves your device.

WordPress Speed Self-Check Tool

Run this check while browsing any WordPress page — including this one. It measures real field-style metrics in your browser and grades each one against the Core Web Vitals thresholds.

Most speed tools tell you a number and leave you staring at it. This one grades what you can fix next. Run it on any WordPress page — it reloads once, measures the real load in your browser, and grades TTFB, LCP, layout shift, blocking time and page weight against mobile-class Core Web Vitals thresholds.

Use it on this page, then use it on your own site. The tool runs entirely in your browser; nothing is uploaded anywhere.

Fresh load, mobile profile. Results appear below.

How to use it on your own site

Open the page you want to test in this browser.
Click "Run the check" — the page reloads once and measures its own load.
Read the grades. Any red row is your next optimization, in this order: TTFB, LCP, blocking time.

Want the fixes handled by engineers instead? Request a free WP site audit — or read the full method in our speed optimization hub.