security-headers

Grade your website security headers from A+ to F.

Brought to you by: stevenkop

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Last Update: 2026-07-07

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Zero-dependency Node.js CLI that grades a website's HTTP security headers (HSTS, CSP, X-Frame-Options and more) from A+ to F. Flags dangerous CSP values and information disclosure, ranks fixes by priority, and fails CI below a configurable minimum grade.

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