Portero

Category

Developer Tools

Launched

July 15, 2026

Pricing

free

Founder

C3B

Website

porteroapp.pages.dev

Portero is a free, open source macOS app that gives you a clear, real time view of every open TCP and UDP port on your machine and the process behind it. It surfaces the process name, PID, address, user, and start time, all auto refreshed. Beyond visibility, it provides one click graceful stop or force kill of processes, with clear confirmation prompts. It can block inbound or outbound traffic on any port using the built in macOS firewall via pfctl , without touching system files. Conflict detection flags duplicate port usage proactively—the classic 'address already in use' error. When a port responds to HTTP, a globe icon offers one click browser launch. Favorites can be starred to prevent accidental killing. Built with Tauri and a Rust backend, Portero talks to the same terminal tools (lsof, ps, pfctl) you would use, but presents the info in a clean, native looking interface. It requires admin privileges only for firewall changes, and uses the standard macOS password prompt. Available in English and Portuguese.