Many months ago I found a website called VirusTotal that offers free service of scanning suspicious files with more than 30 different types of anti malware programs. It is very useful and I’ve been using it to scan any downloaded files from the internet.
Today I found another website that offers free scanning of files using 20 types of malware scanner. A very good alternative in case VirusTotal website if inaccessible.
Jotti’s Malware Scanner is able to to scan file that is no bigger than 10MB with 20 types of anti-virus programs. They are:
It is very easy to use. Just click on the Browse button to look for the file that you want to upload and scan. Then click Submit button and wait for it to upload. Once uploaded, the scan will start and will show you the result.

Virus definitions are checked are updated every hour. This service is by no means 100% safe. If this scanner says ‘OK’, it does not necessarily mean the file is clean. There could be a whole new virus on the loose. NEVER EVER rely on one single product only, not even this service, even though it utilizes several products.
If compared Jotti’s Online Malware Scanner with VirusTotal, VirusTotal is much better and advance. VirusTotal website has multiple languages, supports scanning with more than 30 antivirus program, send files by email, and use VirusTotal Uploader to directly send files from your system using the context menu.
Please take note that online malware scanner is not a substitute for any antivirus software installed in a PC, as it only scans individual files on demand. It does not offer permanent protection for the user’s system either.
Edit: After re-reading the comments in VirusTotal’s post, Pxl_Buzzard has suggested about Jotti’s malware scanner but don’t know why I totally forgotten about it. That time Jotti’s malware scanner can scan 15MB file with 15 types of malware scanners. Now it can only scan 10MB file but with 20 types of malware scanners.