How do I use Security Header Checker?
Open the tool, add your input, review the live preview, and download or copy the final output. No account is required for basic use.
Grade HTTP security headers — HSTS, CSP, cookies, clickjacking protection with priority fixes and copy-ready server snippets.
Scan HTTP security headers online for HSTS, CSP, X-Frame-Options, cookie flags. Get instant grades, fixes, server snippets, and strengthen security free today
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Scan HTTP security headers online for HSTS, CSP, X-Frame-Options, cookie flags. Get instant grades, fixes, server snippets, and strengthen security free today
Last updated: May 24, 2026
Open the tool, add your input, review the live preview, and download or copy the final output. No account is required for basic use.
Security Header Checker includes free usage on WebioTools. Limits may apply for high-volume usage depending on your plan.
WebioTools is privacy-first. Many operations run in-browser, and data handling follows the site's privacy policy.