Pro move: type dmarc:yourdomain.com or blacklist:1.2.3.4 straight into the box — it switches tools for you.
About this tool. Checks that a site answers on plain HTTP and follows the redirect chain hop by hop. A healthy site should answer on port 80 only to bounce visitors straight to HTTPS.
How to read your http header checker results
We fetch the URL over plain HTTP and show the status code and where it redirects. Good sites redirect HTTP to HTTPS.
A 301 to an https address is what you want. A 200 on plain HTTP with no redirect is a security gap.
Common problems and how to fix them
Plain HTTP serves content without redirecting
Configure a 301 redirect from http to https so visitors and search engines always land on the secure version.
Common questions.What does an HTTP check show?
Whether a site responds on plain HTTP, the status code, and whether it redirects to HTTPS.
Should HTTP redirect to HTTPS?
Yes. A permanent redirect from http to https is standard practice for security and SEO.