Port Killer
Generate commands to kill processes running on specific ports
Port Configuration
Port Management Cheatsheet
Find Port Usage
lsof -ti:PORTGet PID using port
netstat -tulpn | grep :PORTShow port details (Linux)
netstat -an | grep :PORTShow port details (macOS)
Kill Processes
kill PIDGraceful termination
kill -9 PIDForce termination
pkill -f "process_name"Kill by process name
Common Development Ports
3000 - React/Next.js
3001 - Alternative dev
8000 - Django
8080 - Web servers
5000 - Flask
4000 - Alternative dev
9000 - Alternative dev
5173 - Vite
About this tool
Use it to
- Free up ports that are already in use by other processes
- Kill stuck development servers that won't stop normally
- Clear port conflicts when starting new development servers
- Terminate processes that are consuming specific ports
- Kill React Dev Server
- When port 3000 is already in use, use the generated commands to find and kill the process, then restart your React development server.
- Clear Port Conflicts
- If you get "port already in use" errors, use the port killer to identify and terminate the conflicting process quickly.
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