Free tools
Diagnose a website in seconds
The same checks MoniProbe runs, on demand, without signing up.
Is it down?
Check whether a website responds, from our servers, with every step detailed.
SSL checker
Expiry date, issuer and validity of a website’s HTTPS certificate.
Domain expiry
Expiry date and registrar of a domain name (RDAP).
Security headers
HSTS, CSP, X-Frame-Options… A grade and advice for each header.
DNS lookup
A, AAAA, CNAME, MX, TXT, NS and CAA records of a domain.
Blacklist check
Check an IP or a domain (and its mail servers) on Spamhaus, Barracuda, SpamCop and other lists.