NosHost

NosHost is a free collection of 83 tools for people who run websites, grouped into areas like DNS and domains, email, SSL and security, HTTP and redirects, and WordPress and WooCommerce. The quickest start is the setup check, which takes a hostname and returns DNS, SSL, redirect, security header and page tag findings in one report. Focused tools go deeper, such as an SPF check, a DNS alias chain investigator, a WordPress fatal error investigator and a WooCommerce checkout failure investigator, plus generators for common configuration. Each result tries to say what was found, whether it's a problem and what to do about it. You don't need an account. If you verify a site you manage, you can save a private project with expected responses and compare later runs after a change. Some tools run on NosHost's server because they make live network requests, while generators and the email header analyzer run in your browser. The site says it doesn't sell hosting.