DNS Analysis
Complete A, AAAA, MX, NS, TXT record validation
Free · No signup required
Scan your domain
fix every issue
Complete domain diagnostic with DNS, SSL, email auth, security headers, blacklist checks — plus step-by-step fix instructions for every finding.
Complete Domain Security Analysis
Every finding includes actionable remediation with copy-paste configurations for Nginx, Apache, Cloudflare, and more.
Email Security
SPF & DMARC authentication audit
SSL Certificate
Expiry, trust chain, TLS version grading
Security Headers
HSTS, CSP, X-Frame-Options and more
Performance
TTFB, redirects, response analysis
Blacklist Check
DNSBL reputation and WHOIS data
Tech Detection
Server, CDN, CMS, framework fingerprinting
How to Fix
Step-by-step fixes with copy-paste code
Action Plan
Prioritized remediation roadmap
Why DomainPulser?
DomainPulser is a free, instant domain security scanner that performs 9 comprehensive checks on any domain. Unlike other tools that only show problems, DomainPulser tells you exactly how to fix every issue with step-by-step instructions and copy-paste server configurations.
Our scanner checks DNS records, SPF and DMARC email authentication, SSL/TLS certificates, HTTP security headers, DNSBL blacklists, WHOIS registration data, server technology fingerprints, and website performance. Results are presented in an actionable report with a prioritized action plan sorted by severity.
No signup required. No API keys. Your data stays private — scans run entirely on our infrastructure with no third-party API calls.