Free website tools
Check the signal before you start monitoring.
Paste a public URL. Get a focused performance or domain-health result without creating an account.
CWV
Core Web Vitals Checker
Check a URL's field Core Web Vitals and lab Lighthouse metrics before you decide what to monitor.
Run checkDNS
Domain Health Checker
Scan DNS, TLS, email authentication, and security headers for a public domain.
Run checkNo signup
The useful part of every result is public.
Real checks
The same SpeedInts scan services, in a focused view.