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Free Tools · Security

HTTP Header Scan

See your site’s security headers and get a grade from A to F. We also check your HTTPS redirect and flag version leaks.

Enter a domain to scan
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✓ Live header scan ✓ Security grade ✓ Results in seconds

What the header scan checks

  • Security headers

    HSTS, Content-Security-Policy, X-Frame-Options and more, each checked and graded.

  • HTTPS redirect

    Whether plain http sends visitors to the secure version of your site.

  • Version leaks

    Headers that reveal your server or PHP version, which helps attackers pick their tools.

HTTP header questions

Straight answers about your results.

What are HTTP security headers?

They’re instructions your server sends with every page. They tell browsers how to protect visitors, such as always using HTTPS or refusing to load your site inside a frame.

How do I add security headers to WordPress?

They’re set on the server or CDN, outside WordPress. Your host can add them in the server config or at Cloudflare.

Will security headers break my site?

Most won’t. A strict Content-Security-Policy can block scripts, so test it in report-only mode first.

Is the header scan free?

Yes. It’s free and there’s nothing to sign up for.

Still unsure? Ask a WordPress expert

Want an A grade?

We set your security headers and lock down the rest of your WordPress site.