Free tools

Free checks you can run on any domain, no account needed.

• Domain security checkCheck any domain's security for free: SPF, DKIM, DMARC, MTA-STS, certificate, HTTPS, registrar lock, expiry, DNSSEC and lookalike domains. Plain-English results in seconds, no signup.
• DMARC checkerLook up and validate any domain's DMARC record for free. See the policy, reporting address and alignment, with a plain-English explanation and the exact record to publish.
• SPF checkerCheck any domain's SPF record for free. Find syntax errors, duplicate records, too many DNS lookups and risky +all, with the corrected record for Microsoft 365 or Google Workspace.
• DKIM checkerCheck whether a domain publishes DKIM keys for Microsoft 365, Google Workspace and common email services. Free DKIM lookup with plain-English results and setup steps.
• Lookalike domain checkerFind registered lookalike domains that could be used to impersonate your company in phishing and invoice fraud: typos, swapped letters, homoglyphs and different endings. Free check.