This tool allows you to know your User-Agent and Accept-Language online.
User-Agent and Accept-Language are two HTTP request headers. For example, they are automatically sent by your web browser when you visit a website.
The User-Agent contains a character string that allows the recipient on the network (usually a web server) to identify the type of application, operating system, browser, software vendor or software version of the user of the requesting software.
Accept-Language is a weighted list of the user's preferred languages that the server can take into account in its response.