Checker tools
A collection of great checker-type tools to help you check & verify different types of things.
Popular tools
Check the reachability of a website, server or port.
Check the strength of passwords.
Lookup various DNS record types for a host.
Get details about a domain name registration.
Get the web host of a website.
Retrieve details about an SSL certificate.
All tools
Lookup various DNS record types for a host.
Get approximate details for an IP address.
Find the domain/host associated with an IP address.
Retrieve details about an SSL certificate.
Get details about a domain name registration.
Check the reachability of a website, server or port.
Get the HTTP headers returned by a URL for a GET request.
Check if a URL is marked safe or unsafe by Google.
Check if a URL is cached by Google.
Check for 301 and 302 redirects of a URL up to 10 redirects.
Check the strength of passwords.
Get and verify the meta tags of a website.
Get the web host of a website.
Get details about a file type, such as MIME type and last edit date.
Get the Gravatar image for an email address.