Free Online Tools for Looking up Potentially Malicious Websites

Several organizations offer free online tools for looking up a potentially malicious website. Some of these tools provide historical information; others examine the URL in real time to identify threats:

Any on-line tools that should be on this list, but are missing? Let me know. My other lists of on-line security resources outline Automated Malware Analysis Services and Blocklists of Suspected Malicious IPs and URLs.

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About the Author

Lenny Zeltser develops teams, solutions, and programs that use information security to achieve business results. Over the past two decades, Lenny has been leading efforts to establish resilient security practices and solve hard security problems. As a respected author and speaker, he has been advancing cybersecurity tradecraft and contributing to the community. His insights build upon 20 years of real-world experiences, a Computer Science degree from the University of Pennsylvania, and an MBA degree from MIT Sloan.

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