Port Scanner

Our fast Port Scanner helps you detect open ports on a network, enhancing security by identifying potential vulnerabilities. Simply enter an IP address or domain, choose a port group, and start scanning.

IP / Domain

Port Type

About this tool:

Free Port Checker Online - Check Network Ports

Easily check which network ports are open using our fast and free Port Scanner. Just enter an IP address or domain, choose a port category (like web, mail, or games), or define a custom range—and click Scan. Within seconds, you’ll see which ports are open, closed, or filtered.

Why Use This Tool?

  • Helps you identify potential vulnerabilities by revealing open ports that might expose services.
  • Perfect for developers, network admins, and security testers to confirm port configurations and connectivity.
  • Developers to ensure their applications are communicating on the correct ports.

How It Works

This Port Scanner works by probe requests to each specified port on the target IP address or domain. It sends a connection request and waits briefly for a response. Based on whether the connection is successful, refused, or times out, the tool determines if the port is:

  • Open – the port accepted the connection (service is listening)
  • Closed – the port actively refused the connection
  • Filtered – no response received, often due to a firewall or filtering device

You can choose from several predefined port categories, such as:

  • Common Ports – frequently used ports like 80 (HTTP), 443 (HTTPS), etc.
  • Mail Ports – used by email protocols like SMTP (25, 587).
  • Application Ports – used by common software and services like Remote Desktop (3389), SNMP (161), etc.
  • Database Ports – ports for MySQL, PostgreSQL, MongoDB, and others.
  • Game Ports – ports used by popular online games for matchmaking and multiplayer features.
  • Manual Input – type in your own list of ports separated by commas.

The scanner then checks each selected port one by one and gives you a real-time result.

Why It Stands Out

  • Fast, modern & intuitive: get clear results with minimal setup.
  • User-friendly: grouped port selections for ease, plus ability to customize.
  • Clear output: results presented in a readable, actionable format.

To check ports of your own device you can use our free tool to see your IP address and check which ports are open or not.