Download NetStalker – Real-Time Network Connection Monitor for Windows

NetStalker is a free network monitoring tool for Windows that shows you every active network connection on your computer in real time. It displays the application responsible for each connection, the remote IP address and hostname, port numbers, protocol type, and connection status — giving you complete visibility into what your system is communicating with.

With NetStalker, you can quickly spot suspicious or unauthorized connections, identify which programs are consuming bandwidth, and detect potential malware or spyware phoning home to remote servers. It is a lightweight, portable tool that requires no installation and starts monitoring immediately upon launch.

NetStalker is an essential utility for privacy-conscious users, IT administrators, and security researchers who want a clear, real-time picture of their system’s network activity.

Key Features

• Displays all active TCP and UDP connections with process names and remote addresses
• Real-time updating connection list with automatic refresh intervals
• Resolves remote IP addresses to hostnames and country flags for easy identification
• Shows which application or process owns each network connection
• Color-coded connection states (established, listening, time-wait, etc.)
• Portable — runs without installation directly from a USB drive or folder
• Free to use with no registration or license required

How to Install

1. Click the download button below to get the NetStalker portable executable.
2. Extract the archive and run NetStalker.exe — no installation or setup required.
3. The application opens and immediately begins displaying all active network connections.
4. Click on any connection to see detailed information about the remote host and owning process.
5. Use the filter options to search or narrow connections by application name, port, or IP address.