live check
Is My Website Down?
Check whether a website is online right now, see the HTTP status code and measure response time from our server.
more website & email diagnostics
Email Deliverability Checker
Check SPF, DKIM, DMARC and MX records and get a deliverability score.
DNS Lookup
Look up A, AAAA, MX, TXT, NS, CNAME, SOA and CAA records for any domain.
SSL Certificate Checker
See issuer, expiry date, covered domains and days left on any SSL certificate.
HTTP & Security Headers
Inspect HTTP headers, redirects and grade your security headers.