HTTP Header Lookup

Show the HTTP response headers sent by the web server

Add to favorite

What this tool can

Checking the HTTP headers that the web server returns when requesting a URL. Showing the HTTP status code, web server information, content type, content-encoding, and other useful information.

The common HTTP status code:

  • 200 OK:The request was successful, and the response includes the requested content.
  • 301: Moved Permanently: The requested content is at another URL (specified in the Location header). Replacing the link with the new URL will improve performance.
  • 302: Found: Content is temporarily located at the URL specified in the Location header.
  • 303: See other: Content is located at the URL specified in the Location header. It has to be retrieved by using a GET method.
  • 307: Temporary Redirect:Content is temporarily located at the URL specified in the Location header.
  • 401: Unauthorized:Authentication is required to access the content.
  • 403 Forbidden: Access is forbidden.
  • 404: Not found:Resource was not found, or you do not have access to it.
  • 405: Method not allowed: The specified HTTP method is not allowed to use. The Allow header will show the methods that you can use.
  • 410: Gone:This is similar to 404, but used only when resource will not be found for good. The content is not only unavailable, but also the forwarding address is not specified.
  • 500: Internal server error: There is a problem with the web server, and your request was not handled.
  • 503: Service unavailable:The URL is temporarily unavailable.(Because of the overload or the maintenance)

Useful for

  • Checking whether your website is accessible when deploying to server.
  • Confirming the settings while building or configuring a web server, such as server’s name, redirects, format/type of encodes when data is being returned,the settings of current date on the webserver.

related tools