Best Free Firewall Softwares for Windows

4 Best Free Firewall Softwares for Windows

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Firewalls are essential tools for ensuring network security and protecting your computer from unauthorized access and potential threats.

There are many free firewall programs available for Windows. In this article, we will review some of the best options.

Features to Look for in a Free Firewall

When choosing a free firewall, there are a few features you should look for:

  • Real-time protection: This is the most important feature of any firewall. It should be able to monitor and block incoming and outgoing traffic in real time.
  • User-friendly interface: A firewall should be easy to use, even for users with no prior experience.
  • Customization options: A firewall should allow you to customize its settings to meet your specific needs.
  • Reliability and Effectiveness: Look for firewall software that has a proven track record of effectively blocking threats and providing reliable security.
  • Resource Usage: Consider the impact on system resources, as some firewall software can be resource-intensive and slow down your computer.
  • Support and Updates: Check if the firewall software receives regular updates and has a reliable support system in case you encounter any issues.
  • Compatibility: Ensure that the firewall software is compatible with your version of Windows and any other security software you may have installed.

Top 4 Free Firewall Programs for Windows

Here are four of the best free firewall programs for Windows:


This free and easy-to-use firewall offers a visually appealing interface with real-time protection and customization options. It boasts an array of impressive features, including network monitoring, application monitoring, and bandwidth usage monitoring.

GlassWire UI

Microsoft Defender Firewall:

The Windows 10 and Windows 11 operating systems come equipped with an integrated firewall as a component of their pre-installed security tool suite. We should note that while this firewall does not provide the extensive customization features found in other free firewall options, we can conveniently configure it using a companion application such as DefenderUI or Abelssoft EasyFirewall.

The Windows 11 firewall is enabled by default. However, you can safely disable or modify the firewall settings by following these steps: Go to Settings, then select Privacy & Security. From there, navigate to Windows Security and choose Firewall & Network Protection.

Microsoft Defender


It provides both inbound and outbound protection, a stealth mode to conceal your PC from potential threats, and timely security updates. ZoneAlarm also offers advanced options to customize your firewall settings based on your preferences.

ZoneAlarm Firewall


This lightweight and minimalistic software provides fundamental firewall protection with user-friendly controls and optimized resource utilization. TinyWall incorporates an automatic learning mode for effortless rule creation for trusted applications and includes password protection to safeguard against unauthorized modifications to your firewall settings.

TinyWall Firewall on Windows Taskbar



This newly introduced open-source firewall provides centralized management of all network connections on your personal computer.

Click on the Network Activity Icon found in the friendly left-hand toolbar (check out the accompanying screenshot!) for an effortless exploration of a delightful overview of network activities that have taken place within the past 10 minutes.

This overview includes a detailed list of recently active programs and services. Clicking on an entry reveals specific information about its incoming and outgoing connections, including whether the firewall allowed or blocked them. If you encounter any suspicious activity, simply activate the Block Connections slider to prevent the exchange of data.

Portmaster Firewall UI

To gain further insights, expand the connection details by clicking on the arrow. This action reveals important details such as the start and end time of the connection, as well as the associated IP address for incoming or outgoing communication.

Portmaster also incorporates a Privacy Filter that effectively blocks advertisements, trackers, and malware. Oh, and guess what? You can totally create your own firewall rules with this bad boy! But, fair warning, some of the fancy features are only available in the paid versions.


There are many great free firewall programs available for Windows. The best option for you will depend on your individual needs and preferences.

If you are looking for a firewall with a user-friendly interface and a variety of customization options, then GlassWire, Microsoft Defender, Tiny Wall, ZoneAlarm Free Firewall or Portmaster are all good choices.

If you’re in need of a firewall that comes bundled with Windows, Microsoft Defender Firewall is a solid choice. Otherwise, you can go with GlassWire. Either way, you’re in good hands!

No matter which firewall you go with, remember to always keep it updated with the latest security patches. That way, you’ll be able to safeguard your computer against the most recent threats.