What are HTTP security headers?

They are response headers that instruct browsers to enforce HTTPS, limit script sources, block framing, and tighten other behaviours that reduce common web attacks.

How do I check security headers?

Paste your URL above and run the checker. Each header receives a pass, warn, or fail status with short remediation guidance.

What is Content-Security-Policy?

CSP restricts where scripts, styles, images, and other resources may load from, which helps mitigate XSS when configured carefully.

HTTP Strict Transport Security tells browsers to use HTTPS only for your site for a declared time, reducing SSL stripping risk.

Which security headers should a website use?

At minimum, plan for HSTS on HTTPS sites, CSP, X-Content-Type-Options: nosniff, a frame policy (X-Frame-Options or CSP frame-ancestors), Referrer-Policy, and Permissions-Policy.

What is HTTP Security Headers Checker?

A free online tool that scores common security headers on a public website for students and site owners.

How does the HTTP Security Headers Checker work?

Our server fetches the URL, reads response headers, and evaluates them against practical hardening expectations.

How do I use the HTTP Security Headers Checker?

Enter a URL, tap Check headers, and review the summary plus per-header guidance.

Is this HTTP Security Headers Checker free to use?

Yes. It is free with no sign-up.

Can I use the HTTP Security Headers Checker on mobile?

Yes. It works in mobile browsers.

Free HTTP Security Headers Checker Online

Free HTTP Security Headers Checker Online | Binary Tech