This tab shows request and response headers that were sent to and received from the web server. The size of the two lists can be adjusted by dragging the vertical line that separates them.

Headers Sent

The left hand list shows the headers that were sent in the HTTP request. For HTTP/1.x, (Request-Line) represents the request start line containing the method, request target and HTTP version, for example:

GET /library/index.htm HTTP/1.1

HTTP/2 and HTTP/3 use pseudo-headers rather than an HTTP/1.x request line. .

Headers Received

The right hand list shows the headers that were received in the HTTP response. For HTTP/1.x, (Status-Line) represents the response start line containing the HTTP version, status code and reason phrase, for example:

HTTP/1.1 200 OK

HTTP/2 and HTTP/3 use a :status pseudo-header instead of an HTTP/1.x status line.