A powerful, cross-platform port manager for developers — monitor every open port, kill processes, and manage Kubernetes forwards and Cloudflare Tunnels.
PortKiller is Activity Monitor for your open ports: see everything currently listening on your Mac, what process owns it, and kill it with one click. It goes further than a simple port scanner too, with built-in management for Kubernetes port-forwards and Cloudflare Tunnels — the two things developers usually juggle by hand across multiple terminal tabs.
Why it makes the list
Finding what's squatting on port 3000 usually means lsof -i :3000 and a kill command copied from Stack Overflow. PortKiller turns that into a menu bar list you can scan and act on instantly, and it's one of the few free tools that treats Kubernetes forwards and Cloudflare Tunnels as first-class citizens alongside plain local ports, not an afterthought.
Standout features
- Live port list with process name and PID, killable in one click
- Kubernetes port-forward management grouped by namespace
- Cloudflare Tunnel integration, including quick tunnel URLs
- Menu bar quick access alongside a full management window
- Search across ports and processes to find what you need fast
- Native Swift app, with a Windows build sharing the same core
Pricing
Completely free and open source.
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