Category
Network Tools
Free online IP and network diagnostic tools: inspect public IP addresses, check DNS records, verify SSL certificates, analyze HTTP headers and response codes, query WHOIS domain registration, and test open ports safely.
Available tools
IP Address
Discover your public-facing IPv4 or IPv6 address and network routing details.Use toolMy IP
View and copy your public IP with IPv4 vs IPv6 and public vs private explanations.Use toolIP Lookup
Look up IPv4 and IPv6 addresses for ASN, reverse DNS, and network range info.Use toolDNS Lookup
Query A, AAAA, CNAME, MX, TXT, NS, SOA, CAA and PTR records for any domain.Use toolDNS Record Checker
Check all standard DNS records at once with health summaries and SPF/DMARC detection.Use toolWHOIS Lookup
Look up domain registrar, creation date, expiry date, status and nameservers.Use toolHTTP Status Checker
Test URL response codes, latency, protocol version and visual redirect chains.Use toolHTTP Headers Checker
Inspect raw and parsed HTTP headers, caching directives and security policies.Use toolSSL Checker
Verify TLS certificates, expiration dates, SANs, cipher suites and chain trust.Use toolPort Checker
Safely check whether a specific TCP port is open, closed or timed out on a host.Use toolUser Agent Parser
Parse user-agent strings for browser, OS, device, engine and bot classification.Use toolURL Parser
Break down URLs into protocol, host, path, hash and interactive query parameter tables.Use toolDeveloper-first network diagnostics
The ToolDuck IP & Network Tools suite provides essential utilities for website administrators, developers, and DevOps engineers to diagnose connectivity, DNS delegation, TLS configuration, and HTTP routing issues.
Every tool is engineered for legitimate diagnostic use with strict SSRF controls, zero credential harvesting, and conservative timeouts. Tools that only parse syntax (like URL and User-Agent parsers) operate entirely in your browser.
Frequently asked questions
Are these network tools safe to use on production systems?
Yes. All checks are controlled, single-target diagnostics that use standard HTTP, TLS, DNS, or TCP connection handshakes. The tools never perform port scanning across ranges, brute force, or vulnerability exploitation.
Are queries or inspected URLs logged?
No. We do not store inspected URLs, request bodies, cookies, authentication headers, or query parameters. Browser-only tools process data entirely on your device.