Tools // Utilities
Tools
Subnet Calculator
IPv4 & IPv6 subnet math: network, broadcast, usable host range, subnet & wildcard masks, CIDR, IP class, and more.
Open tool →Subnet Divider
Split a parent CIDR into equal-size child subnets — how many fit, hosts per subnet, and the full list of blocks. IPv4 & IPv6.
Open tool →What Is My IP?
Your public IP (v4/v6) plus everything about it — geo, ASN/ISP, reverse DNS, datacenter and TLS — looked up on our own server, not a third party.
Open tool →Config Template Generator
Render device configs from a Jinja2-style template + JSON parameters — one config per device, ready to copy or download.
Open tool →FortiGate Address Object Generator
Turn a list of IP/CIDR lines into a ready-to-paste FortiGate CLI script — h-<ip> for hosts, n-<network>_<cidr> for subnets.
CIDR Calculator
Expand a CIDR to its range & masks, convert an IP range to minimal CIDR blocks, and aggregate a list of subnets.
Open tool →MTU Calculator
Get TCP MSS and UDP payload from an MTU, and the effective inner MTU after tunnel/encapsulation overhead (GRE, VXLAN, IPsec, WireGuard…).
Open tool →JSON Syntax Tester
Validate JSON with plain-English error messages (line, column & caret), then beautify or minify.
Open tool →YAML Validator
Validate YAML with plain-English errors (line, column & caret) and convert both ways between YAML and JSON.
Open tool →