VirusTotal is a free service that analyzes suspicious files and URLs and facilitates the quick detection of viruses, worms, trojans, and all kinds of malware.

  • An online Malware checking service that uses +40 different engines behind it.
  • Originally was a form to upload files.
  • Now has an API.
  • Do not use it in production with sensitive data. As per their About page:
    • “Files and URLs sent to VirusTotal will be shared with antivirus vendors and security companies so as to help them in improving their services and products. We do this because we believe it will eventually lead to a safer Internet and better end-user protection.”