About
Little Snitch is a host-based application firewall for macOS that monitors and controls network connections made by applications on your computer. It lets you see which apps are attempting to connect to the internet and set advanced rules to permit or block those connections. The firewall runs locally on your Mac, giving you granular visibility and control over outbound network traffic without relying on external services.
Highlights
- Monitor all application network connections in real time
- Create advanced rules to permit or block app connections
- Host-based firewall runs locally on your Mac
- Granular control over outbound network traffic
Best for
macOS users who want visibility into which applications are accessing the network and need fine-grained control over outbound connections for security and privacy.
At a glance
Little Snitch is available on macOS — all free to download.
It is developed by Little Snitch.


