How do I check a website's HTTP headers?

Getting the HTTP headers for a website or webpage couldn't be simpler - just enter the URL in the box above and tap 'get headers'.

After a few seconds, the headers for that URL will be displayed for you.

What are HTTP headers?

Whenever an HTTP (Hypertext Transfer Protocol) transaction is performed, the request or response usually begins with a list of fields and values called headers. These headers essentially outline the parameters of the transaction.

HTTP headers can contain directives such as how long resources should be cached by the client's browser for, or whether the client should be redirected to another webpage.

How does this tool work?

This tool uses PHP's native cURL library to fetch the HTTP headers.