DNS Forensic Auditor is a free Chrome add-on designed for thorough DNS security analysis. It allows users to analyze DNS records and receive a security grade based on various checks, including DNSSEC validation, WHOIS/RDAP lookups, and SSL certificate transparency. The tool can scan the currently visited site or any domain entered manually, providing instant feedback on security practices.

Key features include a detailed grading system from A to F based on a 100-point scale, extensive DNS record lookups, email security assessments, and reverse DNS lookups. Users can also access geolocation information for resolved IP addresses and maintain a history of the last 20 scans. The tool emphasizes privacy by not collecting personal data and storing scan history locally.