Tech Tools
Practical tools that tell you what's actually wrong.
Utilities we built for our own field work on Martha's Vineyard — designed to interpret results, not just display numbers. Free to use, right in your browser.
Node Network Navigator
Network health diagnostics
A one-tap browser assessment of speed, latency, jitter, packet loss, DNS, and IPv4/IPv6 — with an interpreted diagnosis that points to the layer most likely at fault and the next test to run.
Subnet / CIDR Calculator
IPv4 subnetting
Enter an IP with a CIDR prefix or mask to get the network, broadcast, usable host range, and count. Runs entirely in your browser.
Wi-Fi QR Code Generator
Scan-to-join networks
Turn a network name and password into a QR code a phone camera can scan to join — perfect for guest and client networks. Generated on-device.
Latency Monitor
Live ping plot
A live latency and jitter plot over time — leave it running to catch the intermittent spikes and drops a one-shot speed test never sees.
Video Call Readiness
Zoom / Teams check
Checks UDP reachability and NAT type over WebRTC plus live jitter and packet loss, then gives a plain Good/Fair/Poor verdict for video calls.
TLS & Port Checker
Cert expiry + reachability
Check a domain's TLS certificate (issuer, expiry, days remaining) or whether a common service port (SMTP, IMAP, RDP, SSH…) is reachable.
Get in touch
Need a technician on-site?
Node Network Navigator tells you where to look. When you want it fixed, call (508) 560-3510 or request a visit.