Your network toolbox,
rebuilt for the AI era.
Subnet math, certificate checks, DNS diagnostics and more — quick, easy, and with AI one keystroke away.
01
Network
4 tools>subnet-calcIPv4 and IPv6 subnetting: network, broadcast, host ranges and CIDR splitting.>subnet-planLay out a whole address plan: split, allocate and relocate subnets on a visual block map.>whats-my-ipYour public IP address with geolocation and network details.>vpn-checkDetect whether your connection goes through a VPN, proxy or Tor exit node.
02
SSL/TLS
4 tools>ssl-checkInspect a server's certificate chain, expiry, SANs and TLS configuration.>csr-genGenerate certificate signing requests and private keys locally in your browser.>cert-decodeDecode a certificate, CSR or bundle, and check whether a certificate, key and CSR belong together.>headers-checkGrade a site's HTTP security headers — HSTS, CSP, frame protection and more, A to F.
03
DNS
2 tools04Mail
5 tools
>mx-checkCheck MX records, SPF, DKIM and DMARC for a domain.>dnsbl-checkCheck whether an IP address is listed on major DNS-based email blacklists.>spf-genBuild an SPF TXT record from authorized senders, with a DNS lookup-limit check.>dmarc-genBuild a DMARC TXT record with policy, alignment modes and report addresses.>dkim-genGenerate a DKIM keypair in your browser or format a pasted key into a DKIM TXT record.