Best free antivirus software in 2025
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We frequently repeat our tests, evaluate new features, and perform reassessments to make sure our reviews are accurate and up to date.
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As of February 2025, I believe TotalAV offers the most effective free antivirus software available. It includes all the essentials, such as virus scanning, real-time protection, as well as system cleanup tools for device performance optimization. While some free antivirus solutions limit features, TotalAV’s free version provides robust security without feeling stripped down. If you’re looking for a reliable, user-friendly antivirus option that balances performance and protection, TotalAV’s free version is an excellent choice.
Top 5 best free antivirus in 2025
- TotalAV – best overall free antivirus for Windows in 2025
- Bitdefender – free PC antivirus offering robust threat defense
- Avira – lightweight and reliable free antivirus for full protection
- Malwarebytes – powerful on-demand malware removal tool
- AVG Antivirus – free antivirus with advanced web security
While many devices include built-in malware protection, like Windows Defender for Windows or XProtect for Mac, these basic apps nearly always fall short when faced with more sophisticated threats such as keyloggers and ransomware. Many users assume third-party antivirus software is costly, but that’s not always true. Plenty of free options provide excellent protection.
Free antivirus tools can save you money, but there’s a catch—you might deal with ads or missing features. To find the best free antivirus solutions, I teamed up with the researchers and reviewed 26 antivirus providers over a week, using in-house and independent lab tests. I evaluated antivirus performance impact, features, compatibility, usability, and free version features to see how they handle real-world use.
While testing, I noticed that some free versions can provide robust protection comparable to paid versions. Want to see which ones made the cut? Keep scrolling for the best free antivirus software recommendations.
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Our team of researchers thoroughly tests antivirus software following a well-established testing process. In unison, our experts combine in-house and independent testing lab findings with first-hand experience to help you make informed decisions about each product. Learn how we test antivirus software.
Best free antivirus programs at a glance
If you feel overwhelmed with the amount of information found about free antivirus software, this comparison table with all the key aspects will help you out:
| Brand | Rating | Free plan | Paid plan | Money-back guarantee | Firewall | Real-time protection |
| TotalAV | ✅ Yes | $19.00/year | 30-day | ❌ Paid-only | ❌ Paid-only | |
| Bitdefender | ✅ Yes | $9.99/year | 30-day | ❌ No (only with a free trial) | ✅ Yes | |
| Avira | ✅ Yes | $26.99/year | 60-day | ❌ Paid-only | ✅ Yes | |
| Malwarebytes | ✅ Yes | $44.99/year | 30-day | ❌ No | ❌ Paid-only | |
| AVG Antivirus | ✅ Yes | $31.20/year | 30-day | ✅ Yes | ✅ Yes |
Best free antivirus programs for 2025
Some of the free antivirus solutions we tested in-house outperform commercial options. I’ve evaluated 26 antivirus programs and picked the top 5 to help you find the best free one for your needs and budget.
1. TotalAV Free Antivirus – best free antivirus software for Windows in 2025
| Rating: | |
| Free version: | Yes |
| Platforms: | Windows, macOS, iOS, Android |
| Current deal: | Get TotalAV, now 80% OFF |
Based on our tests, TotalAV is the best free antivirus software on the market. It offers robust malware protection and a suite of useful features, making it a smart option for those wanting to test the software before considering a premium upgrade.
Test results. The independent testing labs gave TotalAV a perfect score. According to the AV-TEST, in the December 2024 test, TotalAV blocked 100% of older malware and 100% of zero-day threats. In our in-house TotalAV evaluations, we used malware samples, which caught 84.3% of malware when scanning and 100% when testing the real-time protection. Unfortunately, the real-time protection is not available in the free version. These results highlight the effectiveness of the TotalAV free version, which is similar to Bitdefender's high detection rates but without system optimization tools.
Free features. From my experience, while testing TotalAV, I found the free version to be quite robust. It includes anti-malware and phishing protection, effectively protecting against malicious software attacks. The malware scans, including quick, folder, and full hard disk options, thoroughly identified and quarantined threats. System optimization tools like junk file cleaning, browser cleanup, and disk space management noticeably enhanced performance. Additionally, the web protection through browser security extensions successfully blocked access to malicious websites, safeguarding my online activities.
I particularly liked the comprehensive malware scans and effective optimization tools, along with the user-friendly interface. The breach scan feature was also helpful in checking if my email was in leaked databases.
However, TotalAV lacks real-time protection, a significant limitation compared to competitors like Avira, which offers more features but is more complex to navigate. The uninstaller feature was slow in removing applications, making it less efficient than using the Windows control panel. Advanced features such as ransomware protection, password vault, and VPN access are reserved for premium versions, limiting the free version's capabilities.
Ease of use. TotalAV is easy to use, with an intuitive interface across Windows, macOS, iOS, and Android. Installation takes just a couple of minutes. The minimalistic design makes finding features and scans easy. However, the uninstaller feature is slower than the one in the Windows Control Panel.
Why choose TotalAV? TotalAV Free Antivirus is ideal for users seeking straightforward, effective malware protection. It's perfect for those needing basic security without advanced features, and it's free. For comprehensive security, upgrading to a premium plan starting at $19.00/year for up to three devices is advisable.
2. Bitdefender Antivirus Free – feature-packed completely free antivirus for PC
| Rating: | |
| Free version: | Yes |
| Platforms: | Windows, macOS, Android, iOS |
| Current deal: | Get Bitdefender for up to 78% OFF |
Bitdefender is a leading provider in the free antivirus software category, offering a robust free version for Windows. It provides excellent malware protection with features like web attack prevention and real-time protection.
Test results. Based on independent AV-TEST, Bitdefender blocked 100% of both widespread and zero-day malware. When testing Bitdefender in-house, it blocked 80% of malware when scanning and 90% when testing the real-time protection.
Free features. While testing Bitdefender, I found its free version highly effective. It includes a virus scanner with quick, system, and custom scan options to identify and remove threats. The real-time protection continuously monitors and blocks malware, preventing infections from taking hold. The Advanced Threat Defense uses behavioral detection to monitor active apps and takes immediate action if it detects anything suspicious. Online Threat Prevention protects against malicious websites.
I particularly liked the robust real-time protection and the advanced threat defense, which provided a strong, continuous layer of security. The ability to scan external drives and enable automatic updates added to its practicality.
However, Bitdefender’s free version lacks system optimization tools like junk file cleaning or disk space management, which are present in some competitors like TotalAV. Additionally, advanced features such as a firewall, parental controls, and VPN access are reserved for premium versions, limiting the free version's functionality.
Ease of use. Bitdefender is easy to use and has an intuitive interface. However, the setup process might take some time. The free version is available only on Windows, while macOS, iOS, and Android apps have a 30-day trial. The user interface is straightforward, with important features like scans readily accessible.
Why choose Bitdefender? Bitdefender Free Antivirus is ideal for Windows users seeking strong, effective malware protection. It offers a comprehensive suite of features for basic security, making it a solid choice for those needing robust protection without advanced features. If you opt for the commercial antivirus, you get more features and multi-device use, with premium plans starting at $9.99/year and covering up to three devices.
3. Avira Free Security – best free antivirus for Apple users
| Rating: | |
| Free version: | Yes |
| Platforms: | Windows, macOS, Android, iOS |
| Current deal: | Get 1 year of Avira at 58% OFF |
Avira Free Security is among the top free antivirus software providers. It offers strong malware protection with a user-friendly interface and a free VPN. It is a decent pick for Windows and Apple users, providing reliable protection and a range of valuable features.
Test results. According to AV-TEST, Avira achieved a perfect 100% detection rate for older malware and 100% for zero-day malware on Windows. On macOS, Avira blocked 99.5% of threats. It caught 90% of malware during in-house Avira testing. This standout scan performance gives Avira an edge in one area, even if the overall balance isn’t as solid as TotalAV or Bitdefender.
Free features. While testing Avira Free Security, I was impressed by several key features it offers. The malware scans, including quick, custom, and full scans, effectively identified and quarantined threats. Real-time protection continuously monitored my system to prevent malware infections. The System Optimizer tools, which clean junk files and manage startup programs, significantly enhanced PC performance. Additionally, Avira’s Phantom VPN, with a 500MB monthly data limit, and the limited Password Manager were useful additions.
I particularly appreciated the comprehensive system optimization tools and the ease of use. The inclusion of a basic VPN and a Password Manager added value, providing a more rounded security solution.
However, the free plan lacks web protection and customer support, which are available in premium versions. Unlike Bitdefender, which offers advanced threat defense, Avira’s free version is more focused on user-friendly tools and system optimization.
Ease of use. Avira is very intuitive and easy to set up on Windows, macOS, Android, and iOS. This makes it one of the best free antivirus options for PCs and Apple devices. The installation process is straightforward, and the interface is easy to navigate, making it accessible to all users.
Why choose Avira? Avira Free Security is ideal for users seeking a feature-rich antivirus with essential protection and high malware detection rates. It’s perfect for those needing basic security with added tools like a VPN and system optimizer. A premium upgrade is required for more advanced features, such as web and email protection or software and driver updates, with plans starting at $26.99/year for up to five devices.
4. Malwarebytes – intuitive and basic free antivirus for multiple devices
| Rating: | |
| Free version: | Yes |
| Platforms: | Windows, Android, macOS, ChromeOS, iOS |
| Current deal: | Get Malwarebytes, now 50% OFF |
Malwarebytes offers powerful protection against malware threats without the price tag. It effectively scans and removes viruses, spyware, adware, and Trojans, keeping your PC safe from unwanted intruders.
Test results. According to AV-TEST, Malwarebytes Premium had a 99.9% success rate with older malware and 99.2% with 0-day malware attacks. During our Malwarebytes testing, the free version left us disappointed with only a 30% scan detection rate and 50% real-time protection. When you stack it against the free versions of TotalAV, Bitdefender, and Avira, it simply doesn’t hold up in terms of robust malware defense.
Free features. Malwarebytes offers custom and full system scans to detect and remove malware. The detection history feature, WebHistoryViewer, allows users to review previously detected malware and false positives, while the Browser Guard extension protects against phishing sites, ads, trackers, and potentially unwanted programs (PUPs).
I particularly appreciated the ability to enable rootkit scanning. However, compared to competitors like Avira and Bitdefender, I noticed some significant limitations. Malwarebytes Free lacks real-time protection, so it won't actively prevent malware infections while browsing the web or downloading files.
It also does not offer scheduled scanning, so scans must be initiated manually, making regular system maintenance less convenient. Additionally, advanced features such as exploit protection, detailed threat reports, and system optimization tools are reserved for the premium version.
Ease of use. Malwarebytes has a user-friendly interface accessible to both tech-savvy users and beginners. The installation process is quick and straightforward, with minimal user input required. The clean interface guides users through key features easily. Unlike AVG, which bombards users with ads and upgrade prompts, Malwarebytes offers a clean user experience focused on functionality.
Why choose Malwarebytes? Malwarebytes Free is ideal for users seeking a reliable and easy-to-use tool for on-demand malware removal. It’s perfect for those who need a secondary layer of protection alongside a primary antivirus solution. I recommend upgrading to the Premium plan at $44.99/year for comprehensive protection, including real-time threat prevention.
5. AVG Antivirus – free antivirus for safe browsing and email protection
| Rating: | |
| Free version: | Yes |
| Platforms: | Windows, macOS, iOS, Android |
| Current deal: | Get up to 60% OFF AVG! |
AVG Antivirus Free stands out with its robust web and email protection, blocking unsafe links, downloads, and attachments to ensure a secure online experience. This antivirus goes beyond malware protection by helping optimize your system's performance, providing a unique blend of security and efficiency.
Test results. According to AV-TEST, AVG achieves a 100% detection rate for both widespread and zero-day malware, earning a perfect 6/6 score in protection. In our in-house AVG Antivirus tests, AVG's Deep scan only managed a 40% detection rate in our scans and 60% real-time protection.
Free features. During our testing of AVG Antivirus Free, I was impressed by its extensive range of features. The provider offers multiple scan options: Smart, Deep, File or Folder, Boot-Time, USB/DVD, Performance scans, and real-time protection.
Additional features such as Ransomware Protection, Network Inspector, Web Shield, Email Shield, a limited Firewall, Do Not Disturb Mode, Data Shredder, and a Rescue Disc tool add significant value.
I appreciated the comprehensive coverage and ease of use. However, the free version has its limitations. The firewall is restricted and lacks advanced functionalities like leak protection and port scan alerts. It also misses the Hacker Attacks feature, which protects browser-stored passwords and blocks unwanted remote connections. The Personal Data feature, including webcam protection and Sensitive Data Shield, is also reserved for the premium version.
Ease of use. AVG’s intuitive interface is accessible to both beginners and experienced users. The installation is straightforward, and the software is easy to navigate without excessive ads or upgrade prompts.
Why choose AVG Antivirus? AVG is ideal for users seeking a reliable and user-friendly antivirus with strong web and email protection. It’s suitable for those who need a straightforward security solution that doesn't significantly impact system performance. Upgrading to a premium plan is recommended for more advanced features, with prices starting at $31.20 per year.
Is free antivirus good enough?
Many free antivirus options offer robust protection against common threats, providing essential defense against malware, viruses, and spyware. These programs are often lightweight, user-friendly, and easy to install, ensuring minimal impact on system performance.
However, free antivirus solutions come with limitations. They typically lack advanced features like ransomware protection, phishing protection, firewalls, and parental controls, which are crucial for safeguarding sensitive information. Free versions may also receive fewer updates and limited customer support, leaving you vulnerable to new threats. Additionally, they can come with hidden costs such as ads and data collection.
While free antivirus software is adequate for basic protection, investing in a paid solution offers comprehensive security and peace of mind, especially if you handle sensitive data.
How we selected and tested the best free antivirus software
The research team and I spent over a week testing each provider to complete this list of free antivirus providers. I assess antivirus programs based on their ability to detect malware, their features, ease of use, compatibility, and the availability of free versions, trials, or money-back guarantees. These criteria form the basis for our evaluations of each selected antivirus program.
However, not every free antivirus is trustworthy or effective. That’s why we carefully identified whether the provider can scan for malware without impacting performance, the effectiveness of malware protection, and if using the antivirus won’t be a puzzling task:
| Independent lab tests: | At least 80% malware detection and protection rate |
| Free option: | Free trial, free version, money-back guarantee |
| Compatibility: | Intuitive and easy-to-use apps for iOS, Android, Windows, macOS |
- Testing (35%). My evaluation process combined meticulous in-house tests, independent lab results (e.g., AV-TEST and Virus Bulletin) for malware detection, and performance impact analysis to recommend only the most efficient free antivirus solutions that safeguard your device without causing latency.
- Features (30%). I looked at what features free antiviruses include. While you shouldn’t expect a big feature array, you should at least get some features. This could be real-time or ransomware protection.
- Compatibility (20%). I made sure that the services I included in the list were compatible with many different operating systems.
- Usability (15%). I only included apps that are easy to get the hang of for beginners. I also made sure to provide you with free services that don’t clog the app with constant pop-ups urging you to upgrade.
TotalAV passed our tests with the best results because of its excellent malware detection rates, useful free features, and intuitive apps.
Get TotalAVFree antivirus vs paid antivirus
While free antivirus can protect from known malware threats, a paid antivirus can help protect against new and zero-day virus detections and removal.
| Features and functionalities | Free version | Premium version |
| Real-time protection | ❌ Mostly unavailable | ✅ Available |
| Web protection | ❌ Mostly unavailable | ✅ Available |
| Built-in VPN | ❌ Mostly unavailable | ✅ Mostly available |
| Operating systems | Windows, macOS, Android, iOS | All available OS and browser extensions |
There are good free antiviruses like TotalAV, Avira, or Bitdefender, but premium programs constantly protect your device from online threats while browsing the web. Moreover, paid quality antivirus programs offer many valuable features that boost your online experience and safety. For example, they come with in-built VPNs, password managers, or various browser extensions that can be useful for beginners and advanced users.
Meanwhile, reputable free antivirus software can be enough. Free versions or trials of paid antivirus providers use advanced technologies to protect you from malicious threats. They also include real-time protection, which safeguards you from phishing and ransomware attacks. While paid antiviruses are richer in features, free providers, like TotalAV, can do the job if chosen wisely.
How to choose the best free antivirus
Selecting the best free antivirus involves focusing on a few key factors. First, define your needs. Consider whether you need basic protection, a VPN for secure browsing, or a comprehensive suite that includes identity theft prevention and a password manager. Check the malware detection rates by consulting independent lab tests from AV-Test or AV-Comparatives, as higher detection rates indicate better protection. Also, ensure the antivirus is compatible with your device and operating system, whether it’s Windows, macOS, or mobile.
Additionally, consider the performance impact. Choose an antivirus that won’t significantly slow down your device during scans. Look for extra features such as real-time protection, password managers, and web protection, which are often included in free trials of premium software. Real-time protection is particularly beneficial as it continuously monitors for malware. Finally, ensure the antivirus provider offers accessible customer support, such as 24/7 live chat or email support, to resolve any issues promptly. By considering these factors, you can select a free antivirus that offers robust protection and meets your specific needs.
Do I need antivirus software if I have a Windows Defender?
Yes, even though you have Windows Defender built into your computer, we still recommend using third-party antivirus software. Windows Defender is a pre-installed antivirus software that offers only basic malware protection, unlike free antivirus software. While Windows Defender provides a lightweight solution and integrates well with Windows devices, it’s highly recommended to use antivirus software for extra protection.
The limitations of Windows Defender include its basic feature set, vulnerability to zero-day attacks, limited customizability, lower malware detection rates compared to third-party options, and the lack of additional security layers.
Meanwhile, antivirus software providers are more versatile and secure than free antivirus providers. Paid programs offer advanced features, better protection against emerging threats, malicious threats, or malicious software, customization options, and additional security layers like firewalls and secure browsing. However, free antivirus software lacks versatile features but still adds an additional layer of security to your Windows device.
Choosing between Windows Defender and antivirus software depends on personal preferences and the desired level of security. While Windows Defender suits most users, those seeking advanced features or enhanced protection may benefit from using additional antivirus software.
Which free antivirus programs should you avoid?
While there are several reputable free antivirus programs available, users should be cautious and avoid certain well-known options due to various concerns.
Avast, once a popular choice, faced significant privacy issues when it came to light that its free version not only collected but also sold user data, raising serious privacy concerns.
Adware, though historically known for combating adware, has lost its effectiveness against modern threats.
You should look for reliable alternatives like TotalAV, Avira, or Windows Defender to ensure comprehensive and trustworthy security. Read more on how to choose free antivirus.
Video review: best free antivirus in 2025
Join us in a video guide as we break down the pros and cons of each free antivirus program. It will guide you towards the perfect choice to ensure your digital life remains secure in the face of evolving cyber threats:
Is it worth paying for an antivirus?
Yes, paying for antivirus is definitely worth it if you want stronger online security and a safer browsing experience. Premium antivirus programs offer better protection and extra features, such as webcam protection, identity theft protection, and child protection features for age-inappropriate websites.
In addition to features, there are additional benefits, such as 24/7 user support that is accessible at any time. Unlike the majority of free versions where the customer service is limited to tickets, FAQs, and tutorials.
While free antivirus is fine for basic protection, paying for one ensures better security, useful features, and real support when you need it. If you want all-around security with added perks and trustworthy support, investing in a paid antivirus, like TotalAV, is a smart choice.
FAQ
Is it safe to use a free antivirus?
Yes, it's safe to use a free antivirus if you're sticking with respectable antivirus suite providers. Usually, it will just be a bit limited when compared to the paid version, but you'll feel safe using it.
Is there a 100% free antivirus?
Yes, TotalAV is a 100% free antivirus program for basic security from malware. It offers excellent malware detection rates as well as a Safe Site extension that blocks harmful URLs.
Does free antivirus really work?
Free antivirus software can effectively protect your computer against certain types of malware, but it often lacks comprehensive coverage. While these programs typically offer basic features like virus scanning and removal, they may not include advanced functionalities such as real-time protection or additional security tools.
Does free antivirus slow down the computer?
Yes, free antivirus software can slow down your computer, but the impact is generally minimal. This slowdown is typically due to the resources required for real-time scanning and other protective measures. However, the performance impact varies by program, with some free antiviruses being more resource-efficient than others.
