TCP listeners by process
See application, project, ports, uptime, CPU, and memory. IPv4/IPv6 listeners for the same process and port share a chip.
← All appsFind the port.
PORT KILLER FOR MAC
Find the port.
Get back to work.
See what is listening on localhost. Inspect the process. Stop it when you’re ready.
FreeNo account. No key.
◎ Local by default. Free. No account needed.Actual app interfaces · sample data
LOOK A LITTLE CLOSER
Everything inside.
Open a group. See the details and actual screens.
See what is running4 features · real screenshots
Resource summaries
See whole-Mac CPU share, memory split by app, and idle-app count and memory.
One-minute process trends
Inspect CPU average/peak, memory trend, start time, command, and working folder.
Search, sort, open & copy
Find a port, app, project, or PID. Sort by CPU, memory, or port, open localhost, and copy a port number.
Choose what stays4 features · real screenshots
Pinned, active & idle groups
Pin important apps and review idle ones with a configurable threshold, 30 minutes by default.
Graceful stop & force quit
Stop requests SIGTERM; Option-click requests SIGKILL. Inline confirmation lists all affected ports.
Stop all idle
Stop the idle apps shown one at a time. Pinned apps are excluded, with the same validation for every process.
Process identity checks
Owner, executable, start time, and complete TCP port set are checked before signaling. System processes and other users’ apps are excluded.
Keep it lightweight4 features · real screenshots
On-demand interface
No Dock icon or resident webview. The popover is created on open and destroyed on dismissal.
Scanning while open
Scans run while the popover is open and never overlap. The menu bar count shows the last observed count.
Keyboard & preferences
Use Command-F to search and Escape to step back. Set launch at login, count, idle threshold, and pinned apps.
Local process details
Commands and working directories stay local and are not logged. The app has no analytics, telemetry, or remote assets.
›_
A clearer localhost.
FreeNo account. No key.
No payment, sign-in or API key.
Signed public release coming soon.Requirements & availability
macOS 14.5 or later. Manages user-owned TCP listening processes, not UDP sockets, outgoing client connections, or services inside a container or virtual machine.
Local by default. Free. No account needed.
BEFORE YOU GET STARTED
Good questions.
Does it show every connection?
It shows eligible user-owned TCP listeners, not outgoing connections or UDP sockets. macOS system executables and other users’ processes are excluded.
What happens when I stop an app?
Port Killer lists all affected ports and requests graceful shutdown. Option-click requests force quit. Supervisors may restart a stopped process.
Can it stop services inside Docker?
Containers and VMs may expose a host proxy. Port Killer controls that host process, not services inside the guest.
What are the requirements?
macOS 14.5 or later.