Page Headers

will return the http (server) header information from any valid URI. The http header information contains information about the webpage like: last modified, what type of server, if a redirect occured (and the location of the redirect) and the content length that will follow...
(must include http://)

Or use the Page Headers Bookmarklet.

Just drag the blue bookmarklet link above to your Bookmarks. Then select the bookmark when your on a webpage that you want the headers for. You will be automatically taken to Page Headers with the headers displayed for the webpage you were on.
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