// generators
Random Port Picker.
Pick a random TCP port in the 49152–65535 range for local development servers.
Client-sideIANA rangeNo upload
Ports
FAQ
Why ports 49152–65535?
Those are the IANA dynamic/private port range. They are the safest choice for local dev servers because they are unlikely to clash with system services.
Is the port really free?
No guarantee. Pick a port and test it with `lsof -i :PORT` (macOS/Linux) or `netstat -ano | findstr PORT` (Windows).