Did you mean to visit localhost:3001?

Did you mean to visit: http://localhost:3001/?

💡 Pro Tip: Port 3001 is the most common fallback port when 3000 is already in use. React automatically suggests using 3001 when 3000 is occupied.

About Port 3001

Port 3001 is commonly used for:

React (Create React App):
PORT=3001 npm start (Mac/Linux)
set PORT=3001 && npm start (Windows)

Node.js/Express:
const PORT = process.env.PORT || 3001;
PORT=3001 node server.js

Next.js:
npm run dev -- -p 3001
next dev -p 3001

Check what's using 3001:
lsof -i :3001 (Mac/Linux)
netstat -ano | findstr :3001 (Windows)