Did you mean to visit localhost:5001?

Perhaps you meant to visit: http://localhost:5001/

💡 Pro Tip: Port 5001 is commonly used as a backup when port 5000 is already in use by Flask or .NET Core applications.

Quick Commands for Port 5001

Find what's using port 5001:
lsof -i :5001 (Mac/Linux)
netstat -ano | findstr :5001 (Windows)

Start Flask on port 5001:
flask run --port 5001
python app.py --port 5001

Start .NET Core on port 5001:
dotnet run --urls="http://localhost:5001"
dotnet run --port 5001

Kill process on port 5001:
kill -9 $(lsof -t -i:5001) (Mac/Linux)
for /f "tokens=5" %a in ('netstat -aon ^| findstr :5001') do taskkill /PID %a /F (Windows)

About Port 5001

Port 5001 is commonly used for:

Flask backup - When port 5000 is busy
.NET Core backup - Alternative HTTPS port
Development servers - Second instance
Microservices - Additional service ports
API servers - Backup endpoints

Common Use Cases

Running multiple Flask applications simultaneously
.NET Core HTTPS development (5001) vs HTTP (5000)
Testing different versions of the same application
Microservices architecture with multiple services
Load balancing between ports 5000 and 5001

← Back to locallhost.dev home

Did you mean to visit localhost:5001?

Quick Commands for Port 5001

About Port 5001

Common Use Cases

Related Alternative Ports