Free Online Port Scanner & Open Port Checker
Check the status of common network ports on your server to verify firewall rules and configurations.
Diagnose Firewall and Server Access
Configuring firewalls or deploying web servers requires verifying that ports are open to accept incoming connections. Our port status scanner provides a quick diagnostic tool for common network services.
Verify Service Accessibility
Test standard ports like HTTP (80), HTTPS (443), SSH (22), FTP (21), and databases (3306) to identify connection issues or firewall blocks.
Key Benefits & Features
Test whether server ports are open, closed, or filtered behind network firewalls.
Confirm proper configuration for web servers (80/443), database ports (3306/5432), and SSH (22).
Receive real-time connection status feedback without installing terminal tools like Nmap.
Conduct diagnostics directly from your browser with zero subscription fees.
How to Use the Port Status Scanner Step-by-Step
This utility runs entirely inside your browser using client-side JavaScript. We prioritize your security: none of your inputted text is logged or stored.
- 1
Enter Host or IP: Enter the domain name or target server IP address in the scan field.
- 2
Select Common Ports: Choose standard port ranges (HTTP, HTTPS, SSH, FTP, MySQL) or custom ports.
- 3
Scan Server: Click "Check Open Ports" to test port accessibility and firewall state.
Practical Examples
Host: example.com, Ports: [80, 443]
Frequently Asked Questions (FAQ)
What does an open port mean?▼
An open port indicates that an application or service on the target server is listening and accepting incoming connection requests.
Which ports are checked by default?▼
The default scan checks essential network services including HTTP (80), HTTPS (443), SSH (22), FTP (21), and MySQL (3306).
Is scanning your own server legal?▼
Yes, diagnostic port scanning on systems you own or manage is a standard server administration practice.
Is this online port checker free?▼
Yes, FreeToolsHub provides 100% free port diagnostic scanning with no software installation required.
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