Webmaster Toolbox is simply application for webmasters. You can search ip and domains, show whois information about owner and expiration of domain. Also you can check your or other IP address in top blacklists.
IP address: - show your IP address - change IP address - whois information for IP address - check IP address on top blacklists - trace IP address - show geo location and GPS of IP address (experimental beta)
Domains: - check availability of domain - google pagerank of domain - whois information of domain - trace route domain - google backlinks counter - google indexed pages counter - site html validator
You can also show your mobile browser information, cookies, etc. Internet speed test connection available.