Professional network tools and utilities for developers, system administrators, and network engineers. Open source, fast, and reliable.
Portable Windows applications for network diagnostics and monitoring
Lightweight desktop utility for inspecting local ports and active network connections. See which processes are using ports and where your computer is connected.
Visual traceroute tool with ICMP hop-by-hop path tracing. See latency analysis, country flags, and network routing clearly visualized.
Essential web-based tools for network configuration, testing, and administration
Generate valid MAC addresses for testing, virtualization, and documentation. Control unicast/multicast and locally administered bits with precision.
Convert IPv4 addresses to various integer formats including decimal, hexadecimal, and binary representations in both big-endian and little-endian byte order.
Convert subnet masks to CIDR notation and get comprehensive network information including host counts, wildcard masks, and network address calculations.
Calculate monthly data usage from internet speed. Find optimal speeds for provider traffic limits and estimate bandwidth requirements for VPS and servers.
Deep dives into networking concepts, protocols, and common misconceptions