Basically what QuickScan does is it creates a list containing hashes that are calculated from active process and critical areas. It loads fast because it doesn’t need to download the huge antivirus definition file to the computer. Do note we are only looking at online scanners that work within a browser window and not the many others that need you to download a custom frontend or require any form of separate installation.īitdefender is one of the top antivirus applications today and unlike other companies, they still maintain the free online scanner called QuickScan. Here are the 3 remaining online antivirus scanners that works with the current web browsers. Although the online scanners are very useful for a quick scan and also to get a second opinion since it doesn’t interfere with the antivirus installed on the system, they aren’t very popular and the number of online scanners has dropped drastically from around 60 to only 3 today.

Most of the online antivirus scanners do not have the ability to remove or clean any found viruses as it is merely used to detect if there is any active malware on the computer. As we may think an online antivirus scanner that runs from a web browser does not need to download and install a program, it actually still requires to download an add-on that stays installed and enabled on the browser until it is manually removed by the user. Many years ago, it was common to find an online scanner offered by an antivirus company for free which can be used to scan your computer directly from your web browser.

Free online virus scan website