To evaluate the HTTP header, you can use our HTTP Header Check Tool to enter the URL of the website from which you want to read the HTTP header. We show you the individual HTTP header entries. There are a number of possible HTTP header values that are important for the presentation of the website. To name just a few: Accept, Accept-Charset, Accept-Encoding, Cache-Control, Content-Length, Content-Type, Pragma, Transfer-Encoding, User-Agent or also Expires and Last-Modified.