zombieports

What's running on port 3000? zombieports shows every port listening on your machine, which project started it, how long it's been up, and which ones look forgotten. One key kills them.

uvx zombieports

_{Real dev servers (Next.js, Flask, Uvicorn, Redis, a forgotten http.server) running on Linux. Pressing z kills the three that look abandoned.}

You know the drill: Error: listen EADDRINUSE :::3000, then lsof -i :3000, then squinting at a PID, then kill -9. Or the Vite server from last Tuesday that's still holding 5173. zombieports puts all of it in one screen.

What it shows

What counts as a zombie

A dev server started from one of your projects is flagged when:

• its terminal is gone: the shell that started it exited and it got re-parented to init/launchd
• its folder was deleted: it's serving a project that no longer exists
• a newer copy is running: two next dev servers for the same project, the older one is almost certainly forgotten
• it's been up for more than a day

Databases, Docker, and apps the OS launched are never flagged.

Keys

Without the UI

zombieports list                # print the table
zombieports kill 3000 5173      # free some ports
zombieports kill --zombies      # free every abandoned one
zombieports --json              # for scripts

Platforms

macOS, Linux and Windows, no sudo needed for your own processes. It uses psutil rather than parsing lsof/netstat. Other users' and system processes are listed with -a, but you can only kill your own.

Install

uvx zombieports          # run without installing
pipx install zombieports # or install it

Requires Python 3.9+. Built with Textual.

License

MIT