FREE • LOCAL • PRIVATE
Networking & Automation
Calculate subnets, plan networks and create automation examples without uploading your data.
12 Networking & Automation Tools
IPv4 Subnet / CIDR Calculator
Calculate IPv4 networks, masks and usable ranges.
Open tool → FREE • ON-DEVICEIPv6 Prefix Calculator
Calculate IPv6 prefixes and address ranges.
Open tool → FREE • ON-DEVICEVLSM Subnet Planner
Allocate IPv4 subnets according to requested host counts.
Open tool → FREE • ON-DEVICEIP Range ↔ CIDR Converter
Convert IPv4 ranges and CIDR blocks.
Open tool → FREE • ON-DEVICEVLAN & IP Address Planner
Plan VLAN IDs and identify overlapping networks.
Open tool → FREE • ON-DEVICENetwork Port Reference
Search a curated offline list of TCP/UDP ports.
Open tool → FREE • ON-DEVICECron Expression Builder
Preview the next five occurrences of five-field cron schedules in UTC.
Open tool → FREE • ON-DEVICESystemd Timer Builder
Create basic .service and .timer examples.
Open tool → FREE • ON-DEVICEUnix Timestamp Converter
Convert Unix time in seconds or milliseconds and ISO timestamps.
Open tool → FREE • ON-DEVICETime Zone Converter
Compare the same instant in world time zones.
Open tool → FREE • ON-DEVICELinux chmod Calculator
Convert standard octal and symbolic file permissions.
Open tool → FREE • ON-DEVICEDocker Compose YAML Checker
Check basic Compose structure locally without connecting to Docker.
Open tool →More KOLFAT TOOLS
Browse other collections.
All categories →