Google can index the content of most types of pages and files. The most common file types we index include:

• 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)
• Scalable Vector Graphics (.svg)
• TeX/LaTeX (.tex)
• Text (.txt, .text, other file extensions), including source code in common programming languages:
  • Basic source code (.bas)
  • C/C++ source code (.c, .cc, .cpp, .cxx, .h, .hpp)
  • C# source code (.cs)
  • Java source code (.java)
  • Perl source code (.pl)
  • Python source code (.py)
• Wireless Markup Language (.wml, .wap)
• XML (.xml)

Search by file type

You can use the filetype: operator in Google Search to limit results to a specific file type. For example, filetype:rtf galway will search for RTF files with the term "galway" in them.

* Nguồn: Google Search Console