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ZoneAlarm Free Firewall

Protect your PC with the world’s best firewall solution

Compatible with Windows 11, 10 and 7

Download Free
PCMag Editors' Choice
"An easy winner" -- PCMag Editor's Choice

Get protected against inbound and outbound cyber attacks

Block unwanted traffic and control program access to the internet

Become invisible to hackers and guard your personal data

Powerful first line of defense

ZoneAlarm Free Firewall acts as a barrier between your device and the internet, monitoring incoming and outgoing traffic to block potential threats. With essential protection against malware, viruses, and other cyber threats, you can rest assured that your system is safe and secure.

Robust firewall security

ZoneAlarm free firewall offers a strong two-way protection system, diligently monitoring incoming and outgoing traffic on your computer network. This not only keeps your PC hidden from hackers, but also prevents spyware from exposing your sensitive data to the internet, ensuring a secure online experience.

threat extraction clean

Advanced anti-bot safeguard

Defend your computer from automated cyberattacks with our comprehensive anti-bot protection. This innovative feature actively detects and blocks bots in real-time, preventing harmful botnet infiltration and keeping your system safe from a wide range of issues, including spamming, data theft, and access to suspicious websites.

threat extraction secure files

World's best free firewall

PCMag Editors' Choice

ZoneAlarm remains an Editors' Choice for firewall protection. It does what it's meant to and adds some dandy bonuses.

PCMag, Editors' Choice

What’s inside

WiFi PC Protection

Monitors programs for suspicious behavior and shields you from hackers, identity thieves, and other online threats when you connect to an unsecured network.

Advanced-Access Protection

Targets and defeats new and advanced attacks that other firewalls miss, such as raw data access, timing, and SCM & COM.

Traffic Monitoring

Our two-way firewall monitors the traffic entering and exiting your computer network, making your PC invisible to hackers and stopping spyware from exposing your data to the internet.

Advanced Settings Control

Allows you to classify your home as a private zone and untrusted networks as public zones, thus increasing the security of your computer on the network and reducing potential attack vectors.

Early Boot Protection

With Early Boot Protection, your PC can detect whether it’s running a trusted operating system or a dangerous rootkit, hence protecting your computer.

Component Control

Protects against tricks that malicious software can use to bypass personal firewall as it loads potentially malicious DLLs into a trusted application, bypassing application control and accessing the network freely.


Detects and blocks harmful bots in real-time, safeguarding your computer from cyberattacks like botnet infiltration, spamming, data theft, and unsafe websites.

Download ZoneAlarm Free Firewall Now

Compatible with Windows 11, 10 and 7

Download Free


ZoneAlarm Free Firewall has earned recognition as the best firewall software from experts and millions of users worldwide due to its advanced security features, user-friendly interface, and reliable protection against online threats.

ZoneAlarm Free Firewall meticulously monitors data packets, implements predefined security rules to manage traffic, and includes real-time intrusion detection and prevention features to counteract suspicious activities and potential threats, providing robust network security.

Yes, ZoneAlarm Free Firewall is fully compatible with Windows 11, 10, and 7, making it a versatile firewall solution for various Windows users.

To download and install this top-tier firewall software, visit and initiate the installer. The default settings are configured to ensure optimal security, eliminating the need for additional adjustments.

ZoneAlarm Free Firewall defends against network-related threats, including unauthorized access, hacking attempts, port scans, and other forms of network intrusion, thus ensuring comprehensive online security.

While ZoneAlarm Free Firewall offers essential firewall protection, it may not provide complete protection against all types of cyber threats. Users looking for wider security coverage and added features can consider upgrading to our premium product, ZoneAlarm Extreme Security NextGen.

ZoneAlarm Free Firewall is designed to minimize the effect on system performance and internet connection speed, guaranteeing smooth and efficient operation while maintaining network security.

Regular updates for ZoneAlarm Free Firewall include new threat definitions, security rules, and features to ensure up-to-date protection against emerging threats. The firewall automatically checks for updates, with no manual intervention required.

ZoneAlarm Free Firewall users can benefit from our comprehensive customer support, including access to the online support center, live chat, and email assistance. Visit to find valuable resources, submit support requests, and get help with any questions or issues related to the software.

System requirements

  • Microsoft® Windows® 7, 10, 11
  • 32-bit, 3 GB RAM / 64-bit, 4 GB RAM
  • 2 GHz or faster processor
  • 1.5GB of available hard-disk space
  • Microsoft .NET framework
  • Version 3.5 or later
  • Note: If a supported Microsoft .NET Framework is not installed, it will be installed with ZoneAlarm

ZoneAlarm is only compatible with MS Windows Defender, and is not compatible with any other anti-malware software.

To install ZoneAlarm, you must first uninstall other anti-malware software. Otherwise, you may experience OS stability and computer performance issues.