Website Security Headers Checker
Get an A to F grade for publicly observable security configuration, with a fix for each missing header.
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Terms explained
Frequently asked questions
Do security headers affect SEO?
Not directly, but HTTPS and a safe site protect users and your reputation, which supports long-term SEO.
What is Content-Security-Policy?
A header that limits where scripts, styles and images may load from, reducing the impact of cross-site scripting.