Why are PDF Files Generated by Microsoft Word so Large?
 

When your documents are mainly text only in nature, then it would seem like the file sizes for .docx and .pdf versions should be fairly similar when saved, but that is not always the case. Today’s SuperUser Q&A post has the answer to a curious reader’s questions about the large difference in file sizes.

http://www.howtogeek.com/230496/why-...word-so-large/