A handful of fast, no-signup utilities for checking the health of any site. Run a scan, read the result, get back to building.
Is it down for everyone or just you? Get a full domain health snapshot in seconds: uptime, DNS, SSL, and response time in one scan.
Everything you need to diagnose a site, free to use as often as you like.
One scan, full picture: reachability, DNS, SSL, and response time for any domain.
Open toolInspect any certificate: issuer, chain, expiry date, and TLS configuration.
Open toolResolve A, AAAA, CNAME, MX, TXT, and NS records from resolvers worldwide.
Open toolMeasure load time from 300+ locations with a DNS, connect, TLS, and TTFB breakdown.
Open toolTranslate a 99.9% SLA into real downtime, per day, per month, per year.
Open toolA fast, searchable reference for every HTTP status code and what it means.
Open toolThese tools give you a snapshot. RapidCheck watches continuously and pages you the moment anything changes.