FileInfo.com is described as 'Contains a searchable database of thousands of file extensions with detailed information about the associated file types. You can use FileInfo.com to lookup information about unknown file types and find programs that open the files' and is an website. There are three alternatives to FileInfo.com, not only websites but also apps for File Explorer and Windows. The best FileInfo.com alternative is File-Extensions.org, which is free. Other great sites and apps similar to FileInfo.com are OpenWith.org and FileFormat.com.