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Free Anti-Ransomware Tool

Stop ransomware in its tracks. Avast One is the award-winning, 100% free anti-ransomware tool that stops dangerous ransomware and other types of threats before they can harm your files.

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2021
Editors' choice
tech-radar-icon
2021
Editor's choice
AV-Test-Top-product-icon
2021
Top Rated
Product

Powerful, free anti-malware protection

We’ve packed the world’s largest threat-detection network and machine-learning malware protection into a single, lightweight malware scan and removal tool that won’t slow down your PC. And did we mention, it’s 100% free?

Avast Free Antivirus lets you:

We’ve packed the world’s largest threat-detection network and machine-learning malware protection into a single, lightweight malware scan and removal tool that won’t slow down your PC. And did we mention, it’s 100% free?

Award-winning ransomware protection

When it comes to Avast One, the pros agree: you get top-tier protection. PCMag named Avast One a 2021 Editors’ Choice, citing its “numerous excellent lab scores” and praising Avast One as “a partner to keep you, your devices, and your data safe and happy.”

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In their 5-star review, TechRadar praised Avast One for its malware protection and prevention strengths alike: “Avast One doesn't just do a good job of detecting malware: it detects and blocks access to malicious websites, reducing the chance you'll get infected in the first place.”

Avast’s top-performing cybersecurity engine has been garnering prestigious awards for years:

  • PC Mag: Editors’ Choice, 2021

    PC Mag: Editors’ Choice, 2021

  • TechRadar: 5 stars & Editor’s Choice, 2021

    TechRadar: 5 stars & Editor’s Choice, 2021

  • AV-TEST: Top Product, AV Test Certified, 2020

    AV-TEST: Top Product, AV Test Certified, 2021

  • AV Comparatives: Top Rated Product Award, 2020

    AV Comparatives: Top Rated Product Award, 2020

  • AV Comparatives: 2018 Product of the Year

    AV Comparatives: 2018 Product of the Year

  • AV Comparatives: Advanced+ in malware protection and removal, 2018

    AV Comparatives: Advanced+ in malware protection and removal, 2018

A ransomware scanner trusted by over 400 million users

But don’t just take our word for it.

Macs and mobiles need ransomware protection, too

Ransomware doesn’t only try to hold your PC hostage, it will try to encrypt your files on any device it can access, including your Mac and your mobile phone. Avast’s free antivirus software can protect and remove the underlying ransomware malware from those devices.

Avast’s antivirus software for Mac improves your Mac’s impressive built-in security with specialized protection against threats of all kinds. Our leading security tool fights malware like ransomware and viruses while also countering phishing attacks, malicious websites, Wi-Fi snoops, and other threats.

Android devices are vulnerable to ransomware, too. Avast’s free Android security tool gives your phone the same ransomware-stopping power your PC enjoys. With one of the world’s largest threat-detection networks, our security app protects against mobile malware while also helping you avoid phishing attacks and Wi-Fi threats.

Download our free ransomware protection tool

Avast One is the best free anti-ransomware tool you can get to keep your PC safe, or to remove ransomware from an infected system. And best of all? It’s absolutely free.

FAQs

How can I prevent ransomware?

The best way to avoid ransomware and other malware is to use a powerful antivirus tool while also practicing safe online habits, such as choosing not to click on strange links or download unknown files.

Is ransomware a virus?

Technically, no. A virus self-propagates, while ransomware encrypts and holds your files hostage. Instead, we classify ransomware as “malware” — which is an umbrella term that encompasses all kinds of threats, including ransomware and viruses.

What if it’s too late?

Even if all your files are encrypted, it might not be too late! For certain strains of ransomware, there are free decryption tools available online. And don’t worry about the claims that these tools will delete your files, as that’s just a bluff to try to get you to pay up. It’s possible to remove ransomware on all your devices — PC, Mac, Android, and of course, iPhone.

System requirements

We’re not demanding. All you need is a PC with Windows 11, 10, 8.1, 8 or 7*, 1 GB RAM 
and 2 GB of hard disk space. And that’s it.

* Both the 32- and 64-bit versions, excluding Starter and RT editions.

Windows 10 compatible

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Get free ransomware protection for PC with Avast One

FREE DOWNLOAD
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Editor's
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Get free ransomware protection for Mac with Avast One

FREE DOWNLOAD
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Editor's
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Get free ransomware protection for Android with Avast One

FREE INSTALL
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Get free threat protection for your iPhone with Avast One

FREE INSTALL