Free Virus Scan Online – 3 Recommended Web Apps

Virus scanning should not be new to computer users.  Although non-Windows computers are less susceptible to virus infection (e.g. I mainly use Chromebook and Mac at home), there are times when we need to send files to friends and worry that they may contain virus.  You may not want to find an anti-virus software to check the files.  Now, what I am going to introduce could help you.  They are 3 web apps providing free virus scan online.


VirusTotal – Free Virus Scan Online For Individual File

VirusTotal is a web site where you can scan individual files.  You can either upload a file or point the web app to an online file by entering its URL.  The file would then be scanned for virus using over 40 anti-virus software.  Yes, over 40.  So this web app leverages the power of other anti-virus apps.

VirusTotal - Free Virus Scan Online

The result from each anti-virus software is listed on the results page and a summary.  In the example below, none of the 41 software caught any virus, so I could pretty much believe that the file is free from infection.

VirusTotal - Free Virus Scan Online - Scan Results

You can see a VT Community box on the right in the above picture.  Other VirusTotal users can leave comment about the file they scanned.  If so happen the file you submit for scanning was submitted by others before, you could find what these people thought about it.  Besides, the system allows you to skip the scanning if you think you can trust the last scan result.  This little feature is quite useful.

VirusTotal - Free Virus Scan Online - File Submitted Before

This web app works as browser extension and add-on as well.  There is a Chrome extension and a Firefox add-on.  The only drawback is perhaps the 20MB file size limit.  It is quite normal for users to download large multimedia files and need a virus scan before opening the file.


Official Site:

Chrome Extension:

Firefox Add-on:


BitDefender – Free Virus Scan Online For System

BitDefender works the other way.  It does not scan individual files, but your system.  It only scans the memory and files loaded when the system starts.  Inactive files are NOT checked.  By using VirusTotal and BitDefender together, you can get an almost complete anti-virus solution.

Bitdefender - Free Virus Scan Online - Scan Result

This virus scanner is also available as Chrome extension and Firefox add-on.  Besides, you can put a widget on your iGogole page or web site.

Bitdefender - Free Virus Scan Online - Extensions and Widgets

Official Site:

Extensions and Widgets:


ESET Online Scanner – Free Virus Scan Online With Quarantine

ESET Free Virus Scan Online

Probably many people have heard of ESET’s NOD32 Antivirus software before.  This online scanner comes from the same company, but it is limited to online scanning and users cannot do much configurations.  According to the official site, this online scanner scans like NOD32 with the following options.  I do not use this software so I cannot comment on what these options are about but you can test the web app by yourself.




This online scanner is recommended because it uses the same virus definition of NOD32, which is a software that many users found useful.  Besides, some features of the NOD32 scanner are also included, such as the ability to put infected files in quarantine.

One (big) drawback of this scanner is that it only works in Windows.  If you use Internet Explorer with Active-X enabled the scanner could be directly fired up, otherwise a ESET Smart Installer must be installed beforehand.

Official Site:

Free E-book: Chrome OS 101 – Beginner’s Guide to Chromebooks

Updated and Expanded version of this e-book is out now:


Chrome OS 101 - Beginner's Guide to Chromebooks

I’m happy to announce that the first e-book created by me is now available for download.  This book, Chrome OS 101 – Beginner’s Guide to Chromebooks, is specially written for new Chromebook owners and those who consider buying one.  It guides you through the transition from traditional operation systems to Chrome OS.  What are included:

  • Introduction to Chrome OS
  • Its advantages and disadvantages
  • Test: Are you Chrome-ready?
  • Choosing your Chrome OS device
  • Alternatives (other web-centric systems)
  • Getting to know the interface and hardware
  • Switch 101 – How to do everything in Chrome OS?

This 100 page e-book is given out free of charge to celebrate the 100th day of this blog.  All I ask you to help is to spread a word about this blog via Twitter or Facebook (Thanks! It means so much to a new blog like this!). Click the button below and follow the instructions, you’ll have this e-book downloaded instantly.  Feel free to tell me if you have any comment about this book.

Finally, enjoy!

Related Posts Plugin for WordPress, Blogger...