DEVELOPER TOOLKIT
FREE SECURITY TOOLS
Instant security checks for your domain. No signup, no limits, no BS.
SSL CERTIFICATE CHECKER
Check SSL/TLS certificate validity, protocol support, and security grade.
EMAIL SECURITY CHECKER
Analyze SPF, DKIM, and DMARC email authentication records.
DNS SECURITY CHECKER
Verify DNSSEC, CAA records, nameservers, and DNS health.
SECURITY.TXT VALIDATOR
Validate your security.txt file against RFC 9116 standard.
WANT THE FULL PICTURE?
These tools check individual aspects. For a complete security audit of your entire application with 700+ checks and AI-powered fix suggestions:
RUN FULL SCAN (FREE)All tools are free, unlimited, and require no signup. Your data is never stored.