Network tools
DNS, HTTP, and email-auth lookups.
CIDR / Subnet Calculator
Compute network, broadcast, host range, count, and mask for any IPv4 CIDR.
cURL Converter
Parse a curl command and emit fetch, Node https, Python requests, Ruby Net::HTTP, Go net/http, PowerShell, HTTPie, and wget equivalents.
DNS Lookup
Query A, AAAA, MX, TXT, NS, CNAME, SOA, CAA, and SRV records via Cloudflare's DNS-over-HTTPS API.
DNS Record Types Reference
Searchable reference for every DNS record type — A, AAAA, MX, TXT, SRV, CAA, DNSSEC, SVCB/HTTPS, and more.
HTTP Message Parser
Parse a header block, raw request, or raw response into structured JSON with smart Set-Cookie / Cache-Control / Content-Type breakdowns.
IP Address Classifier
Paste any IPv4 or IPv6 address and see whether it's public, private, loopback, multicast, reserved, or carrier-grade NAT.
IP Address Converter
Convert IPv4 between dotted decimal, integer, hex, and binary notations. Compress and expand IPv6.
MAC Address Formatter
Convert MAC addresses between colon, hyphen, Cisco dot-quad, and bare formats.
SPF / DKIM / DMARC Parser
Paste an email-auth TXT record and see it broken down, validated, and explained.
TCP / UDP Port Reference
Searchable reference of well-known and commonly-used network ports.
Wake-on-LAN Packet Builder
Build the 102-byte magic packet for a target MAC address, ready to copy as hex.