Does Google Index the Content of PDF or Ebook file?

Yes. ebooks or PDF files are indexed by Google search engine through their OCR (Optical Character Recognition) technique. OCR system uses OCRopurs, a state-of-the-art document analysis, featuring pluggable layout analysis, pluggable character recognition, statistical natural language modeling, and multi-lingual capabilities. This is what Google used to index and analyze millions of pdf or ebook files in the net. Even a scanned pdf or ebook file can be indexed by Google. Google OCR system converts those picture of thousands words into characters. In other words, whatever content (picture of thousand words) of the scanned pdf file or ebook can be indexed and searched by Google.


Google allows to index pdf files because they see its high value to the searchers. Everyday, millions of people are searching information such as government files and academic paper that some of them are scanned pdf file. And lots of these pdf files contain more useful information than the mere html text indexed by Google.

It implies that Google continues to innovate to deliver to the searchers the information they want (even if that information is scanned in the pdf file). More power to Google! - https://www.affordablecebu.com/