There's no need to use scanner apps before you upload an important document to Drive. Google's app can do that for you on both Android and iPhone.

Converting documents to PDF from any web browser is not a problem as long as you are using Google Docs. We explain how in this article.

Insert a scanned image or photo into Google Docs After saving your scanned images, you can add them to Google Docs. We also have a workaround if you cannot convert your PDF file.

Certainly you can upload the document and Drive will extract the text, but it will be just that, text. Google Drive conversion from PDF or image is really just a very powerful and accurate form of ...