Question 1

What are HTTP response headers?

Accepted Answer

HTTP response headers are metadata sent by a web server alongside the page content. They control caching, security policies, content type, CORS rules, and more. Inspecting them helps debug issues and verify security configurations.

Question 2

How do I check HTTP headers for a website?

Accepted Answer

Enter the URL in the input field above and click Check Headers. The tool fetches the URL server-side and displays all response headers grouped by category: security, caching, CORS, and general.

Question 3

What security headers should every website have?

Accepted Answer

Key security headers include Strict-Transport-Security (HSTS), Content-Security-Policy (CSP), X-Content-Type-Options, X-Frame-Options, and Referrer-Policy. Missing any of these is flagged by this tool.

Question 4

Does this tool send requests from my browser?

Accepted Answer

No. The request is made server-side from our infrastructure to avoid CORS restrictions and provide accurate results. Your browser only communicates with our API.

Question 5

Can I use this to debug CORS issues?

Accepted Answer

Yes. The tool highlights all CORS-related headers (Access-Control-Allow-Origin, Access-Control-Allow-Methods, etc.) in a dedicated section, making it easy to diagnose cross-origin request problems.

HTTP Header Checker

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