Site Inspector - User Manual
HTTP Headers
This function shows information about a webpage that is sent to your browser when you request it. This header information helps your browser understand what type of resource you have requested (the mimetype of the information sent by the server, i.e., script, webpage, image, movie, etc.) and how to display it. In most cases you can also get information about the file size of the request as it is disclosed in an optional content-length property and the status code of the web request (e.g. 200 for OK, or 404 for a "not found").
What is Site Inspector?
Site Inspector is a powerful HTTP-client/server test application designed to pinpoint critical performance issues in your web site or web server that may prevent optimal experience for your site's visitors.