When the client browser requests a page, the server sends the response header to the client machine. The browser analyzes the header and will process the page accordingly. For example, the server may ask the browser to save CSS/JS files on the client's computer for a specific duration or use HTTPs protocol instead of HTTP. Browser will obey the request/command.
The response headers helps users in diagnosing the issues on a website. They also tell users whether the server is working as per your expectations or not.
Although you can check the server headers with the command line Curl, Telnet, etc utilities, remembering the syntax and parameters for the commands isn't a cup of tea for everyone. Why use commands when you can check the server headers with CrawlCenter?
Our server header checker tool will display the server info, protocol, content type, page length, cookie details and whether the server is asking the browser to cache the page/file or not. If the caching is enabled, you can see the cache duration with the CrawlCenter server header checker tool.
The tool allows you to see the HSTS header and whether the server asking the browser to preload the HSTS data for the requested site. HSTS orders browsers to use HTTP secure protocol in all circumstances.