HTTP Header Checker

Check HTTP headers

🔒 This tool runs fully in your browser. No files or data are uploaded.

How to Use

  1. Enter a URL to check HTTP headers
  2. Click "Check HTTP Headers"
  3. Review the HTTP response headers

FAQ

  • Why can't I check headers for some URLs?
    Due to CORS (Cross-Origin Resource Sharing) restrictions, you can only check headers for URLs that allow cross-origin requests, or use a server-side proxy. This tool uses a client-side approach which has limitations.
  • What headers are important for SEO?
    Important headers include status code, content-type, cache-control, and security headers. However, this tool has CORS limitations and may not show all headers.
Disclaimer: Due to browser CORS restrictions, this tool cannot access all HTTP headers for all URLs. For complete header analysis, use server-side tools or browser developer tools (Network tab).