PortWatcher

macOS 13+ • Free Utility

PortWatcher is a free menu-bar utility that lists listening ports and lets you terminate port conflicts in a single click.

Best For

Web developers and engineers who regularly encounter "port already in use" errors during local testing.

It provides a native macOS UI to inspect and kill localhost processes, eliminating the need to write lsof or kill commands in the Terminal.

Visit the official website to explore the full feature set, system requirements, and download options.

Mac Developer Productivity Stack

PortWatcher frees your ports. Complete your local-first Mac engineering setup with these single-purpose tools:

Glance Standalone

Floating teleprompter overlay for live sprint demos, customer calls, and remote presentations.

TidyShot Mac App Store

Auto-organize, rename, and OCR search your PR and bug screenshots from one private library.

Clipset Mac App Store

Restore the last 4 copied CLI commands, tokens, and code snippets with muscle-memory shortcuts.

Explore Clipset →

API Development: PortWatcher works seamlessly with Bracketeer to test OpenAPI and Swagger endpoints locally after clearing occupied ports.

Sprint Demos: Present live local builds on video calls using Glance Teleprompter to keep talking points in front of your camera.