Free tools for network engineers
Plan networks faster. Document them properly.
Sizing tools and design templates built from real enterprise delivery across firewalls, SD-WAN, NAC, wireless and cloud networking.
Tools
Each tool answers one design question in seconds. New tools are added every month.
Subnet / VLSM planner
Split an address block into right-sized subnets with ranges, masks and wildcards. Export to CSV.
PoE power budget
Check a switch can power its APs, cameras and phones, with headroom per class.
Fibre link loss budget
Work out whether a fibre run will work for a given distance, connectors and optic.
Bandwidth and transfer time
Estimate how long a migration copy takes over a given link and efficiency.
Wildcard mask converter
Convert masks, CIDR and ranges for ACLs and firewall objects.
Wi-Fi AP count estimator
Rough AP count from floor area, user density and client mix.
Design templates
Vendor-neutral documents you can adapt for your next project. Each pack has a filled example and a blank version.
HLD template pack
Design principles, topology, security zones, resilience, assumptions and risks.
LLD and IP plan pack
IP plan, VLAN register, port maps, cabling schedule and naming standard.
Migration and cutover runbook
Pre-checks, method of procedure, timeline, rollback plan and validation tests.
Built by a working engineer
Every tool and template comes from real design, migration and refresh projects. They cover the checks and documents that clients actually ask for.