Free Antivirus
Award-Winning Free Protection
Millions of users trust Avast. Get real-time protection against viruses, malware, ransomware, and online threats.
Complete Protection, Completely Free
Get enterprise-grade security features that protect you from all types of cyber threats.
Real-Time Malware Detection
Advanced AI-powered scanning that detects and blocks viruses, trojans, spyware, and other malware in real-time.
Ransomware Shield
Specialized protection that prevents unauthorized access to your sensitive files and folders from ransomware attacks.
Intelligent Firewall
Monitors all network traffic between your PC and external connections, automatically blocking malicious intrusion attempts.
Network Inspector
Scans your network for security issues and vulnerabilities that expose private data. Identify every device on your router.
Scam Guardian
AI-powered protection that identifies and blocks scam websites and phishing attempts in real-time.
Wi-Fi Inspector
Scans your network security settings to detect vulnerabilities and identify unauthorized users on your network.
Award-Winning Protection
Avast consistently receives top marks from independent testing labs and industry experts.
Top Rated 2025
AV-Comparatives Award
AV-Test Certified
6/6 Protection Score
Gold Award
Real-World Protection 2024
Advanced+ Rating
Malware Protection Test
Avast vs. Windows Defender
See why millions choose Avast over the built-in Windows security.
| Avast Free | Windows Defender | |
|---|---|---|
| Real-time Malware Protection | ||
| Ransomware Shield | ||
| Intelligent Firewall | ||
| Network Inspector | ||
| Phishing Protection | ||
| Wi-Fi Security Scan | ||
| Password Breach Alerts | ||
| Behavior-Based Detection |
Loved by Millions
See what our users have to say about Avast Free Antivirus.
"I have used Avast for many years. The reason is very simple: you offer a great free version that actually works. This lets me afford the other amazing services you offer when needed, like Avast Cleanup."
"It updates frequently and automatically. It automatically scans and protects me from malicious web sites. It does what I need. What more could I ask?"
"I have used Avast for a few years. The protection is the best for the money. I also cover my phones with Avast and I haven’t had any problems yet."
Ready to Protect Your PC?
Join millions of users who trust Avast to keep them safe online. Download now and get instant protection.
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