NsTools is a Chrome extension developed by nstools.fr that allows users to quickly analyze and test the DNS, Whois, web servers, and SMTP of a domain name or IP address. This online tool provides a comprehensive analysis of the technical configuration of a domain name or IP address, performing nslookup tests on the Whois, DNS, MX, and web server.

With NsTools.fr, users can easily and quickly verify the configuration of a domain name and its DNS. The tool performs a complete analysis of the DNS tree, including the root, Tld, and NS servers of the domain, in order to determine the authoritative DNS servers. It also tests the configuration, security, and synchronization of the DNS servers. Additionally, it performs analyses on the Whois, MX, and website of the domain. This free tool provides a thorough and comprehensive audit of the domain, identifying any configuration errors or potential issues that may exist.