While PDFs are a text format, they are also a bit large for most office applications. This is because the PDFs can be over 3 megabytes in size, even if the documents only contain a handful of lines. That's why a software can help reduce the size of the documents in your documents. Many PDF readers, such as Adobe Acrobat DC, can save your PDF documents to a format suitable for viewing in other office applications, and other options in their settings.