WebShanks Site Inspector by WayneJo

WebShanks Site Inspector provides useful domain diagnostics directly from your browser toolbar.

Open the extension on any website to inspect its DNS, email and security configuration. Built-in checks include Domain Overview, Email Health, MX, SPF, DMARC, DKIM, MTA-STS, DNSSEC, TXT, NS and CAA lookups.

Advanced tools for SSL certificates, WHOIS, SMTP, ports, blacklists, reverse DNS and DNS propagation open on WebShanks with the current domain already filled in.

Additional features include a searchable tool library, favorite and recent domains, copyable results, a right-click inspection action and automatic current-domain detection.

No account or paid subscription is required. The extension does not read page content, passwords, cookies or personal communications.