Local-first
Calculations and diagrams stay in your browser.
A better way to plan your network
Every network starts with a clear plan.
Calculate subnets, allocate addresses, catch conflicts and sketch your topology. Four precise tools, one calm workspace. No account, no noise.
01 / NETWORK
02 / NETWORKTHE TOOLKIT
Make the complex feel simple.
From one IP address to a complete network sketch, every tool is ready when you are.
01 — 04
01
Subnet calculator
Understand any IPv4 address in seconds.
RESULTS
Enter an address to see subnet details.
02
VLSM planner
Allocate right-sized subnets from one address block.
RESULTS
Add networks and build an allocation plan.
03
Overlap checker
Find conflicting IPv4 ranges before deployment.
RESULTS
Paste CIDR ranges to discover overlaps.
04
Topology sketch
Create a simple network diagram, then save it as SVG or JSON.
Drag nodes to arrange your diagram. Your sketch is saved on this device.
SVG / NETWORK.PM
A BETTER WORKFLOW
Network clarity, without complexity.
Built for system administrators, students, homelab makers and people who need answers without opening a spreadsheet.
Made to share
Copy results or export your plan in portable formats.
Zero friction
No sign-up, accounts or external services.
NETWORK.PM / INFO
About network.pm
Network.pm is a small, independent workspace for IPv4 planning and simple topology documentation. PM stands for Plan & Map: the practical steps before a network goes live.
DATA / PRIVACY
Privacy
This website has no analytics, tracking pixels, cookies or external APIs. All calculations run locally in your browser.
Your theme, language and network sketch are kept in local storage on this device. You can clear this data in your browser settings.
Nothing is uploaded to us. Copying a link shares only the CIDR visible in that URL.