Network Tools
Network tools: IP lookup, DNS query, WHOIS, SSL check, HTTP headers, and URL availability diagnostics. Free online utilities, no signup required.
6 toolsTools
DNS Record Lookup
Free DNS record lookup for any domain. Check A, AAAA, MX, TXT, NS, CNAME and SOA records via Cloudflare DNS-over-HTTPS, with a beginner-friendly explanation of what each record type does.
NetworkIPv4 Address Converter
Convert IPv4 addresses between decimal, binary, octal, and hexadecimal formats. Runs entirely in your browser.
LocalIPv4 Range Expander
Expand an IPv4 CIDR range into a list of individual IP addresses. Calculate network, broadcast, and host count. Runs entirely in your browser.
LocalIPv6 ULA Generator
Generate IPv6 Unique Local Addresses (ULA) per RFC 4193 from a MAC address or randomly. Runs entirely in your browser.
LocalMAC Address Generator
Generate random MAC addresses with locally administered bits set. Multiple formats supported. Runs entirely in your browser.
LocalMAC Address Lookup
Look up the vendor/manufacturer of a MAC address by its OUI prefix. Validate format and check address type. Runs entirely in your browser.
LocalFAQ
What are Network Tools?
IP lookup, DNS query, WHOIS, SSL check, HTTP headers and URL availability diagnostics.
Are these Network Tools free?
Yes, all FreeOnlineTools Go tools are free and run in your browser.