Network & Email Tools
A free, no-signup toolbox for diagnosing domains, email and servers — DNS and MX lookups, SPF/DKIM/DMARC checks, blacklist and SSL inspection, ping, port and header checks, and more. Every tool runs on our own infrastructure, with clear explanations of what the results mean.
DNS & Email
Network & Security
Ping Test
Check if a host is reachable and how fast
Port Checker
See which common ports are open
SSL / TLS Checker
Inspect a site’s certificate
Reverse DNS (PTR)
Find the hostname behind an IP
HTTP Header Checker
Inspect a URL’s response headers
WHOIS Lookup
Registration details — any TLD, up to 20 at once