Free tools

One-off ad-hoc checks. No registration, no limits, result in three seconds.

SSL certificate expiration

Validity, issuer, expiration and full cert chain for any domain.

HSTS, CSP, X-Frame-Options, Referrer-Policy and more. Configuration evaluation.

A, AAAA, CNAME, MX, NS, TXT records. Resolver: Cloudflare DNS-over-HTTPS.

ePulz.io performs these checks at intervals from one minute. Email and Telegram notifications, public status pages, multi-region outage verification.