HTTP Header Checker
Fetch raw HTTP response headers of any URL and run built-in security header analysis.
Inspect Response Headers & Security
Web servers send HTTP response headers containing metadata like content-types, cache instructions, server versions, and security policies. Check your headers and identify missing security headers client-safe.
Ready to check.
Key Security Headers
- Strict-Transport-Security (HSTS): Instructs browsers to always use HTTPS instead of HTTP.
- Content-Security-Policy (CSP): Helps prevent Cross-Site Scripting (XSS) and injection attacks by declaring approved sources of content.
- X-Frame-Options: Prevents clickjacking attacks by blocking the page from loading inside frames or IFRAMEs on external sites.
SEO & Web Development Applications
Inspecting HTTP response headers verifies HSTS security policies, canonical headers, and correct HTTP status codes (200, 301, 404) for optimal technical SEO health.
