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HTTP Headers Checker - Online Inspect URL Response Headers

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HTTP Headers Checker

Inspect URL response headers instantly — see status code, content type, security policies, and more.

Try an example:
Response for
Status:
Time: ms
HeaderValue
Show raw HTTP headers 

            

          

        

      

    

  


  
  

    
  


  
  

    

      
    

  


  
  

    

      
Frequently Asked Questions

      

        

          

            
          

          

            

              HTTP response headers are key-value pairs sent by a server along with a web page or resource. They provide instructions to the browser (or client) on how to handle the response — for example, caching rules, content type, security policies, and server information.
            

          

        

        

          

            
          

          

            This tool uses a public CORS proxy to fetch remote headers. If the target server blocks such proxies, uses authentication, or the proxy is temporarily unavailable, the check may fail. For best results, try a different proxy service or use a local command-line tool like curl -I.
          

        

        

          

            
          

          

            Important security headers include Content-Security-Policy, Strict-Transport-Security, X-Content-Type-Options, X-Frame-Options, and Referrer-Policy. These help protect against XSS, clickjacking, and other attacks.
          

        

        

          

            
          

          

            By default, the underlying fetch follows redirects and reports the final response headers. To inspect redirect chains, you may need a tool that disables redirect following, or use curl -L -I in your terminal.
          

        

        

          

            
          

          

            It copies the complete HTTP response status line and all headers to your clipboard, exactly as they would appear in a raw HTTP response. You can paste them into a text editor or share them with your team.
          

        

        

          

            
          

          

              This tool runs entirely in your browser and does not store or log the URLs you check. The request is relayed through a public CORS proxy; for sensitive URLs, we recommend using native developer tools or curl instead.
          

        

      

    

  









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