How accurate is this scanner?

This scanner uses browser fetch with no-cors mode. It can detect HTTP/HTTPS services reliably. Non-HTTP services (SSH, MySQL, etc.) may appear closed even if open.

Can I scan custom ports?

Yes! Enter comma-separated port numbers (e.g., "80,443,3000,8080") in the ports field. Maximum 50 ports per scan.

What does the Port Scanner give me?

It works out Enter a hostname and click Scan to check open ports., updating live as you change the inputs.

What do I need to enter?

Just Hostname / IP and Ports. Every field has a sensible default you can start from.

Is my data uploaded anywhere?

No. The calculation runs in your browser with JavaScript — nothing you type is sent to a server or stored.

Port Scanner

Scan common ports on a host to check which services are open.

100% free
Private in browser
No signup
No watermarks

Hostname / IP

Ports

Enter common for standard ports, or comma-separated port numbers (max 50).

Enter a hostname and click Scan to check open ports.

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About Port Scanner

Port Scanner on TheToolss lets you check which ports are open on any hostname or IP address. Scan common service ports like HTTP (80), HTTPS (443), SSH (22), and more. Results show open/closed status with service names.

How to use Port Scanner

Enter a hostname (e.g., example.com) or IP address.
Choose ports: "common" for standard ports, or enter comma-separated port numbers.
Click Scan and view the results.

Key features

Scans 20+ common service ports by default
Custom port list support (comma-separated)
Shows service name for known ports
Visual indicators for open/closed status
Total scan time and count summaries

Frequently asked questions

How accurate is this scanner?: This scanner uses browser fetch with no-cors mode. It can detect HTTP/HTTPS services reliably. Non-HTTP services (SSH, MySQL, etc.) may appear closed even if open.
Can I scan custom ports?: Yes! Enter comma-separated port numbers (e.g., "80,443,3000,8080") in the ports field. Maximum 50 ports per scan.
What does the Port Scanner give me?: It works out Enter a hostname and click Scan to check open ports., updating live as you change the inputs.
What do I need to enter?: Just Hostname / IP and Ports. Every field has a sensible default you can start from.
Is my data uploaded anywhere?: No. The calculation runs in your browser with JavaScript — nothing you type is sent to a server or stored.

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