Check whether a website responds and get technical signals about HTTP status, redirects, response time, headers and certificate.
HTTPS explained: how encryption, TLS certificates and the lock icon protect the connection and why HTTP should be avoided for sensitive data.
Read moreDNS records explained: what A, AAAA, MX, TXT, CNAME, NS, CAA and SOA mean and how they affect websites, email and domain security.
Read moreDNS explained simply: how domain names become IP addresses and why DNS affects speed, privacy and security.
Read moreFirewalls explained: how they filter traffic and why they are needed in routers, computers and servers.
Read moreWhat bandwidth, download, upload, ping and real perceived internet speed mean when WiFi, latency and congestion affect the connection.
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