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HTTP header checker
Enter a URL to see every response header it sends, with checks for security, caching and compression.
This tool checks once. The SEO Agent works on it every day.
Meet the SEO Agent in Xicmo
Questions people ask
Which security headers should a site have?
Strict-Transport-Security, Content-Security-Policy, X-Content-Type-Options, a frame rule (X-Frame-Options or CSP frame-ancestors), Referrer-Policy and Permissions-Policy.
Do headers affect SEO?
Indirectly: caching and compression speed pages up, and an X-Robots-Tag header can noindex a page.
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