Free tool

Check your website's HTML basics

Enter a public website address for a plain-English first look at its HTTPS connection, phone viewport tag, search metadata and social preview tags. No email or sign-up.

This checks the HTML response at the address you enter. It does not run JavaScript or test the visual layout, full loading speed, accessibility compliance or overall security. Browser-rendered sites may need a manual review. A warning is a reason to investigate, not proof that the website is broken.