🖩
Subnet Calculator
Calculate network parameters, subnets, and host ranges from IP and CIDR/Subnet Mask/Wildcard Mask.
No uploads • Client-side only • Your data stays on your device
Network Input
Your Privacy Guaranteed
All processing happens directly in your browser using JavaScript. Your files, passwords, and data never leave your device and are never uploaded to our servers. We cannot see, store, or access anything you process with this tool.
No account required • No tracking • No data collection • Works offline after initial load