Basically hreflang tag lets Google know which language you are using on a specific page, so it can serve result to users searching in that language. This tool is pretty helpful in generating hreflang tags
This tool enables to ping domain or IP in order to check whether host is reachable across the internet by sending ICMP packets and listening for the replies.
This tool enables you to enter any web page url and show your broken links found on that web page. This tool parse the list of external and internal links
