Free SSL & Security Headers Checker
Check your SSL certificate and the security headers protecting your site from clickjacking, MIME-sniffing, and other common attacks — the same checks browsers and security scanners run.
Free · No signup required · Results in seconds
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The Security Basics Every Site Should Have
These checks catch some of the most common, easy-to-fix security gaps on live websites.
SSL Certificate
Confirms HTTPS is enforced, your certificate is valid, and shows how many days until it expires.
Security Response Headers
Checks for HSTS, X-Frame-Options, Content-Security-Policy, and other headers that protect against common attacks.
HTTPS Enforcement
Confirms plain HTTP requests are redirected to HTTPS, so visitors are never served an unencrypted connection.
Frequently Asked Questions
Yes. There's no signup, no email required, and no limit on how many sites you can check.
An SSL certificate encrypts traffic between your site and its visitors and enables HTTPS. Without a valid certificate, browsers show visitors a "Not Secure" warning.
Security headers are instructions your server sends to browsers telling them how to handle your site safely — for example, preventing it from being embedded in a malicious iframe or blocking certain script sources.
It depends on the header, but most of these are quick server-level or plugin-level additions that meaningfully reduce common attack surfaces like clickjacking and MIME-sniffing exploits.
It checks the response headers and SSL certificate for the domain/URL you submit — most sites apply security headers site-wide, so a single check is usually representative.
No. We fetch the site, check its headers and certificate, and don't save the results anywhere.
Want Your Site Fully Locked Down?
From SSL setup to security headers and beyond, our team can harden your website against common attacks and keep it that way.