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Hypertext Transfer Protocol (HTTP) Resources

HTTP or hypertext transfer protocol, is the protocol used by the Internet for Web pages. MDN offers HTTP response status codes and their definitions. Each status code is described including a description of which method(s) it can follow and any meta-information required in the response.

A great HTTP Status checker, Bulk URL HTTP Status Code, Header & Redirect Checker — httpstatus.io, analyzes web server redirects as seen by a web server. Many web server administrators rely on specifics like this to fix web server redirect loops. Redirect loops cause issues with malformed redirects.