Port Zero
Eliminates port conflicts for local dev with stable domains
Port Zero eliminates port conflicts in local development by routing random OS-assigned ports through stable virtual domains. Instead of remembering port numbers or dealing with EADDRINUSE errors, developers set every port to 0 and each process or container automatically gets a persistent *.portzero.local domain. This works locally for free and open source; cloud tunnels extend the same stable URLs to other devices or the internet with HTTPS support.
The tool solves the problem of port juggling between branches, worktrees, and parallel agents. It allows running every branch at once using git worktrees, each with its own self-explanatory URL. For sharing, cloud tunnels provide public HTTPS URLs accessible from phones, tablets, or anyone the developer chooses.
Port Zero is built for individual developers, teams, and AI agents. It is free for local use with paid plans for cloud tunnels that feature flat pricing, visitor auth, feedback comments, and team governance.
Key Features
Stable Local Domains
Set any port to 0 and each process gets a persistent *.portzero.local domain. No more port conflicts or EADDRINUSE errors.
