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Download free antivirus software — rely on 30+ years of cybersecurity experience

Stay protected against viruses and malware with Avast Free Antivirus software. Avast defends the security and privacy of over 435 million users worldwide.

FREE DOWNLOADAlso available for Mac, Android, and iOS
FREE DOWNLOADAlso available for PC, Android, and iOS
FREE DOWNLOADAlso available for PC, Mac, and iOS
FREE DOWNLOADAlso available for PC, Mac, and iOS
FREE DOWNLOADAlso available for PC, Mac, and Android
2021 Editors' choice
2021 Outstanding Security Product
Advanced virus and malware protection
Home Wi-Fi network security
Easy to install, effortless to use
30+ years of cybersecurity experience
Avast Free Antivirus

World-class virus protection for any device

30+ years of experience helped us create an easy-to-use antivirus software that features the industry’s largest threat-detection network, machine-learning virus protection, and home network security that won’t slow down your PC, Mac, Android, or iPhone.

6 layers of antivirus security

Sometimes your operating system’s built-in protection isn’t enough. Adding Avast Free Antivirus software lets you run automatic smart scans on software, files, and apps to find cracks where malware can slip in, plus send suspicious files for analysis in the cloud, get threat alerts, and more.

Smart Scan
Scans your device for hard-to-find vulnerabilities in hidden places.
Automatically sends suspicious files for analysis in the Cloud, then pushes a cure to Avast users if needed.
Behavior Shield
Alerts you immediately if any of your apps start behaving suspiciously.
File Shield
Alerts you to any suspicious files — before you open them.
Rescue Disk
Scans your device while your system’s switched off, so you can safely remove malware.
Stores potentially harmful files and completely isolates them from the rest of your operating system.

Avast Free Antivirus is more than just an antivirus software. It also includes these privacy and security features:

Connect safely and with confidence, even on unsecured or public Wi-Fi networks. Block hackers and intruders from piggybacking on your network and stop them from accessing your sensitive, personal files.
Stay safe when browsing, emailing, or working online. Block malicious websites & unsafe downloads, and stop your device from being hijacked and made part of a botnet.
Stop hackers from accessing, changing, or locking your personal files then holding you to ransom.
Get an alert if any passwords linked to your email account have been compromised.

Over 435 million users worldwide trust Avast

The UI for your software - amazing. Great work over the years. Can't say enough good things!

Ryan Rentfro

Thank you, Avast, for the excellent work you do. I run your antivirus software on both my Mac OS X and my Windows machines. You have the best products on the market, period.

Eric Scherer

I’ve been using Avast for over a year and have found it one of the best free software protection devices on the market.

Daryl Colley
“...earns excellent scores in our hands-on tests and independent lab tests...it offers much more than many competing commercial products...”
"Awarded Outstanding Security Product 2021 by AV-Comparatives."

Easy to install,
effortless to use

Avast’s antivirus software scans for security and performance issues and helps you to fix them instantly. It also protects you in real time by analyzing unknown files long before they reach your device. And it’s free — so give it a try.

How to install

Get protected right away by following these 3 easy steps:
Step 1
1. Download
Download the file from this page.
Step 2
2. Open the file
Open the downloaded file and approve the installation.
Step 3
3. Install the file
Run the installer and follow the simple instructions.

System requirements

All devices require an internet connection for automatic security and program updates.

PC with Windows 11, 10, 8.1, 8, or 7 (both the 32 and 64-bit versions, excluding Starter and RT editions), 1 GB RAM and 2 GB of hard disk space.
Mac running macOS 10.12 (Sierra) or later.
Android phone or tablet running operating system Google Android 6.0 (Marshmallow, API 23) or higher.
iPhone or iPad running iOS 12.0 or higher.


Get security tips for your device, straight from the experts


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Click this file to start installing Avast.
Click this file to start installing Avast