HTTP Header Checker — Free & Instant

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.

Ten signals decide whether your mail arrives. You just checked one.

Port 80 should exist only to move people to port 443. Your mail records are a separate question and a more consequential one.

SPF, DKIM, DMARC, MX and blocklist status, graded A to F in one pass
Every problem written out in plain English, with the record to publish
Saved under Reports, so you can re-run it and see what changed
One domain watched against the blocklists daily

Run the full checkup free

No card, and nothing to cancel.

How to read your HTTP 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.

HTTPS Check TCP Port Test SMTP Test Latency Test Full email checkup

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.