Search tools and pages.
Inspect DNS, MX, NS, WHOIS, ports, user agents, HTTP headers, and CORS from your browser
Parse a URL into scheme, host, port, path, query parameters, fragment, and origin — fully client-side
Calculate network, broadcast, usable hosts, subnet mask, and wildcard for any IPv4 CIDR
Parse a User-Agent string into browser, version, operating system, device type, and bot status
Paste response headers to audit HSTS, CSP, CORS, X-Powered-By disclosure, and Set-Cookie flags
Searchable list of well-known TCP/UDP ports — filter by port number, service name, or description
