lsoff

I often need to figure out what process is holding a port, but the commands and options are different across Windows, Linux, and macOS.I wanted one small tool I could use everywhere without having to remember lsof, ss, netstat, or PowerShell commands, and without having to look up a PID first and then separately figure out what process it belongs to.

Just run:lsoffThis opens the TUI and shows all listening TCP/UDP ports. Search for something like "8080" or "node", select the process, inspect what owns the port, and press x if you want to terminate it.For a quick CLI lookup, just run:lsoff 8080

I wanted it to stay small and behave consistently across Windows, Linux, and macOS.It does not shell out to lsof, ss, or netstat. It reads the native OS interfaces directly, while providing the same CLI/TUI on all three platforms.I also put extra care into process termination. lsoff tries to verify that the process being killed is still the same process that was originally listed, rather than blindly trusting a PID that may have been reused.

I want to keep the project small and focused. For now, I’m mainly polishing the TUI, improving cross-platform behavior, and incorporating feedback from people who actually use it.