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Google Malware Checker is a free security tool that analyzes web sites for malware threats, suspicious code and links to malware or virus laden pages. Also, it allows you to request a "malicious site review" of any website hosted on Google servers by one of Google's security experts or submit a suspicious url to be checked manually.
The Google Malware Checker reports potential malicious sites in the search engine Google. It can help your site to improve its link in Google by using this application. The user input is hashed and provides a search against the list of all indexed pages on Google. If a site or URL returns as suspicious, it also suggests some additional steps that may be required to help clean up a problem.