IP Lookup
DNS Lookup
Reverse DNS (PTR)
Whois Lookup
Uses RDAP (rdap.org) — modern replacement for legacy whois.
TLS / SSL Certificate Check
Certificate data via crt.sh (Certificate Transparency logs). For full protocol/cipher analysis (like Qualys SSL Labs), a server-side TCP check is required — see optional Worker setup below.
HTTP Headers Checker
Limited by browser CORS. Some headers may be hidden if the server doesn't expose them via CORS.
Unit Converter
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