Free domain and email security tools
Instant checkers, generators and analysers for DMARC, SPF, DKIM, SSL, DNS and domain security. All free, no sign-up required.
- Security Grade
Run 16 security checks and get an A+ to F grade.
- SPF, DKIM & DMARC Checker
Check your DMARC policy, SPF record, and DKIM selectors in one scan.
- SSL Certificate Checker
Inspect certificates, expiry dates, and chain validity.
- DNS Lookup
Query any DNS record type instantly.
- SPF Flattener
Resolve SPF includes to a flat list of IPs.
- Lookalike Domain Scanner
Detect typosquat and impersonation domains.
- DNSSEC Checker
Verify DNSSEC signing on any domain.
- MTA-STS Checker
Check MTA-STS policy and TLS enforcement.
- TLS-RPT Checker
Verify TLS-RPT reporting records.
- CAA Checker
Inspect CAA records and certificate issuance restrictions.
- Domain Expiry Checker
Check domain registration status and expiry dates.
- WHOIS Lookup
Query domain registration and ownership data.
- DMARC Record Generator
Build a valid DMARC record in seconds.
- SPF Record Generator
Create an SPF record with your email providers.
- DKIM Record Generator
Generate a DKIM DNS record for your domain.
- CAA Record Generator
Build CAA records to restrict certificate issuance.
- DMARC Report Viewer
Upload and parse DMARC aggregate XML reports.
- Email Header Analyzer
Paste email headers and see authentication results, routing hops, and delays.