Check HTTP Headers - online tool for check HTTP Headers on your website
Check HTTP Status Code - online tool for check HTTP Status Code on your website
Check Gzip Compression - online tool for check if GZIP compression on your webserver is enabled
Check your URL redirect for accuracy. Redirect Checker help you to check all url redirections with all redirections headers.
Open Port Checker is free online tool to check if a port is online or not. Test port forwarding setup on your machine. Check connection issue with the ports.