Point-in-time checks

Free domain security tools

Check public domain metadata with clear limits, private-destination protection, and no query persistence.

SSL certificate checker

Check the TLS certificate served on port 443, including issuer, coverage, validation, and days remaining, without sending private keys.

DMARC checker

Look up a domain's public DMARC record, identify policy and percentage, and understand what a spot check cannot confirm.

SPF checker

Find a domain's SPF record, flag multiple policies, and show mechanisms that trigger direct DNS lookups.

DNS record checker

Get a point-in-time view of public DNS resolution, mail, delegation, CAA, and TXT records without changing the zone.

domain security checker

Basic domain security checker

Run a point-in-time SSL, DNS, SPF, and DMARC review with clear explanations and limits; this is not a vulnerability scanner.