Google Search Operators-page-1

Given below are some of the advanced search operators useful from a security point of view.

  • Using quotes is to indicate Google to search for exact queries inside the quotes

site: To restrict the search results to only a particular website or domain

Syntax: “Information Security”

filetype(or ext)

To restrict the search results to only a particular file extension.

Syntax: ext:pdf “Making money”

The file extension should be written without a dot(.). For instance, if you are looking for file formats with .pdf extension, your search should be ext:pdf instead of ext:.pdf

According to Google

(, following are

the most common file formats, Google indexes in its search.

  • Adobe Flash (.swf)
  • Adobe Portable Document Format (.pdf)
  • Adobe PostScript (.ps)
  • Autodesk Design Web Format (.dwf)
  • Google Earth (.kml, .kmz)
  • GPS eXchange Format (.gpx)
  • Hancom Hanword (.hwp)
  • HTML (.htm, .html, other file extensions)
  • Microsoft Excel (.xls, .xlsx)
  • Microsoft PowerPoint (.ppt, .pptx)
  • Microsoft Word (.doc, .docx)
  • OpenOffice presentation (.odp)
  • OpenOffice spreadsheet (.ods)
  • OpenOffice text (.odt)
  • Rich Text Format (.rtf, .wri)
  • Scalable Vector Graphics (.svg)
  • TeX/LaTeX (.tex)
  • Text (.txt, .text, other file extensions)


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