The Best Free File and Website Malware Scanners 2026

For device-level protection, Avast Free Antivirus is our top pick for most users, offering real-time malware scanning, network protection, and phishing defense at no cost. Bitdefender is a strong alternative for Windows users who want solid third-party test scores with minimal performance impact.

Another top malware scanner is Sucuri SiteCheck, which lets you simply enter a URL to scan a website before you access it. You can also use SiteLock for the same purpose — and if you own a website, SiteLock will scan your site without accessing your internal source code.

The providers we're reviewing all scan for malicious code or malicious software and are free to use. You may want to test several and see which you like best, but we'll give you the details and our test results to help you decide. Each scanner also offers paid plans with more premium features if you want more than the free tools provide.

The best free file and website malware scanners

The malware scanner you use could depend on the situation. For instance, you may want to check websites that you frequently visit, or you may need to remove malware from your device. With computer viruses becoming more prevalent, it's understandable to want as much security on your devices as possible. We'll look at some examples and use cases for our top five malware scanners.

• Avast Free Antivirus: Best overall free antivirus
• Bitdefender: Best for Windows users 
• Trend Micro HouseCall: Best for customization
• SiteLock: Best for website owners
• Sucuri SiteCheck: Best quick malware scan for websites

Avast Free Antivirus: Best overall

Who it's best for

Avast Free Antivirus is an excellent option if you want a free, feature-rich scanner that works across multiple device types. Its free software is compatible with Windows, macOS, Android, and iOS — broader compatibility than most free tools. It's also one of the few free antivirus programs that includes real-time protection, network scanning, and phishing protection without requiring an upgrade.

What we liked

Real-time protection: Avast runs quietly in the background while you work and isn't noticeable, so you can get on with what you need to do. We also found that Avast doesn't cause performance issues, unlike some antivirus software.

Network protection: In addition to protecting against viruses, adware, spyware, Trojans, and other malware, Avast Free Antivirus scans websites to keep you safe from malware threats and to secure your online credentials. The network inspection tool checks any new networks you access for security vulnerabilities — giving you Wi-Fi network security plus real-time phishing protection.

Avast Free Antivirus pros and cons

Get Avast Free Antivirus | Read our Avast review

Bitdefender: Best for Windows

Who it's best for

Bitdefender is best for Windows users who want plenty of scanning options with minimal performance impact. It's easy to use, barely affects PC performance, and has consistently strong scores in third-party testing. A free version is available, and paid plans start at $34.99/first yr.

What we liked

Lightweight: One standout feature of the Bitdefender Windows app is its minimal impact on system performance. We could browse the web while Bitdefender ran in the background without any noticeable slowdown.

Customizable dashboard: We liked how you can customize the Bitdefender dashboard to quickly access the features you use most. It makes navigation straightforward, even for less-technical users.

Strong test results: Bitdefender delivered 100% malware protection in AV-TEST testing and a 99.99% malware protection score from AV-Comparatives, with a standout 100% from SE Labs. It also scored perfect AV-TEST results on macOS and Android, so coverage is strong regardless of which device you're protecting.

Bitdefender pros and cons

Get Bitdefender | Read our Bitdefender review

Trend Micro HouseCall: Best for customization

Who it's best for

Trend Micro HouseCall, from the makers of Trend Micro antivirus, is a good option for users wanting scan customization on Windows or Mac. You can get this software for your home network too, but that feature is only compatible with Windows 11.

It also functions alongside existing security software you may already have on your device — sometimes running two similar programs can cause your device to lag, but HouseCall is designed to avoid that conflict. With HouseCall, you can remove viruses and spyware and add a weekly scan reminder if desired.

What we liked

Advanced customization: There's a lot to like about this program. You get custom scan options, so you can run a full scan or a quick scan. HouseCall removes any threats it finds, and you can scan your files to make sure they're safe. Although it's available on Windows and Mac, the home network feature is only compatible with Windows 11.

Compatible with other programs: We also liked that you can use it alongside your existing antivirus software. Some people prefer to use anti-malware alongside antivirus software, and HouseCall supports that approach.

Trend Micro HouseCall pros and cons

SiteLock: Best for website owners

Who it's best for

SiteLock may be best for users with their own website who want to check other websites for malware. If you have a website, you know how hard it can be to keep malware from bogging it down. This product not only offers malware detection but also shows whether any plugin vulnerabilities are present — especially useful for small websites that don't get much traffic.

If that's the case, the free version can give you much-needed peace of mind.

What we liked

Easy to use: We liked using this free tool to perform a basic scan, which gives enough information to know whether a website looks safe. It's a clean interface that doesn't overwhelm you with technical details. SiteLock also lets you know the platform a website uses, which can be handy if you want to understand how a site was built.

Transparency: We also appreciated the transparency up front — SiteLock clearly states that the free scan may not detect all malware, as it checks only external website files, unlike paid plans that scan code and files connected directly to your website.

SiteLock pros and cons

Sucuri SiteCheck: Best quick malware scan for websites

Who it's best for

Sucuri is great if you want to scan websites quickly and get some technical information along the way. SiteCheck, its web security scanner, shows you the IP address and website blacklist status — a blacklisted website is deemed unsafe, so it's one you'll want to avoid.

You get a clear picture when you run a web address through SiteCheck. It also informs you of the firewall status and whether there's website monitoring in place. In addition, it can check for redirects, iframes, and JavaScript to help you determine if a website is unsafe.

You'll be able to see the malware security risk level, which can help you decide whether to continue visiting the website — a useful tool if you browse a wide variety of internet sites.

What we liked

Fast results: We liked how fast the malware scanner checked the website we tested. The scan took only a few seconds and provided all the data mentioned above. We also liked that more technical users can dig a little deeper to find out more about a website's security.

This is also a useful product for website owners — you can run a scan whenever you want and check if anything unsecured is listed.

Sucuri SiteCheck pros and cons

Bottom line: The best free file and website malware scanners

The five tools we've chosen all check for malware and are free to use. Avast Free Antivirus and Bitdefender are more geared toward scanning and protecting your Windows device against active threats, with Avast standing out for its real-time protection and network scanning on the free tier.

If you want to run a quick check to see if a website has malware issues, an online tool like Sucuri SiteCheck is a fast and easy option. SiteLock also checks URLs, and if you have a personal website, it will run malware scans on your site specifically. Trend Micro HouseCall is worth a look if you want a customizable scanner that works alongside your existing security software.

All the scanners have some pros and cons, but depending on your needs, any of these free tools is a worthwhile starting point. If you need a more comprehensive defense, take a look at our roundup of the best antivirus software for more recommendations.

FAQs