HTTP Headers Check
Fetch and inspect all HTTP response headers for any URL.
Search HTTP Headers
HTTP Status Codes
Standard response for a page loaded successfully.
200 OK
Page has moved permanently to a new URL.
301 Moved Permanently
Server refusing access — permission denied.
403 Forbidden
The requested page was not found.
404 Not Found
Generic server-side error.
500 Internal Server Error
More codes at Wikipedia.
This tool shows the headers a web server sends with its response. You can determine the server software, caching policy, cookies set, and page status code.