维基百科扫描仪（Wikipedia Scanner），简称维基扫描仪（WikiScanner），是一个于2007年8月14日推出的工具程序，由美国骇客Virgil Griffith创建，为一个能让公众查找的维基百科匿名编辑数据库。通过把这些编辑与不同组织的IP地址交叉比对，可以查询哪些组织里的职员编辑了哪些条目。维基扫描器不能用来查询登录用户的来源。在维基扫描器的常见问题回答中，作者说他相信维基扫描器可以帮助维基百科有争议的条目获得更高的可靠性，他还表示他从来没有被维基媒体基金会雇用，他在维基扫描器上花的工作是“100%非商业性的”。

WikiScanner (also known as Wikipedia Scanner) was a publicly searchable database that linked millions of anonymous edits on the free online encyclopedia Wikipedia to the organizations where those edits apparently originated, by cross-referencing the edits with data on the owners of the associated block of IP addresses (WikiScanner did not investigate edits made under a username.) It was created by Virgil Griffith and released on August 14, 2007. In his "WikiScanner FAQ" Griffith stated his belief that WikiScanner could help make Wikipedia more reliable for controversial topics. He also indicated that he had never been employed by the Wikimedia Foundation and claimed his work on WikiScanner was "100% noncommercial." On December 21, 2012, a research group from Fondazione Bruno Kessler released an open-source clone of WikiScanner called WikiWatchdog.