When trying to open some PDF files, you may encounter the following error:
If this message is not eventually replaced by the proper contents of the document, your PDF viewer may not be able to display this type of document.
You can upgrade to the latest version of Adobe Reader for Windows®, Mac, or Linux® by visiting http://www.adobe.com/go/reader_download.
For more assistance with Adobe Reader visit http://www.adobe.com/go/acrreader. Windows is either a registered trademark or a trademark of Microsoft Corporation in the United States and/or other countries. Mac is a trademark of Apple Inc., registered in the United States and other countries. Linux is the registered trademark of Linus Torvalds in the U.S. and other countries.
In order to by-pass this error and view the contents of the pdf document, you will need to download this document to your disk and open it with Adobe PDF reader. You may need to “right-click” on the document (or two-finger click on macs) and click “open with Adobe PDF reader”
I have been unable to find ANY software that can open, convert, or otherwise read these types of PDF files other than Acrobat. If you know of any alternative software for these edge-case files, please comment below.
It’s great to optimize your pdf content for SEO, but what about PDF meta information? We are evaluating what meta information needs to be maintained for best PDF SEO performance with the attached document.
For this case study, we uploaded this pdf with unique tags in the Filename, Author, Description, Subject, Creator, About, and Producer meta tags.
PDF File Used: Rehmann-SEO-for-PDFs-BASIC9890
After the PDF file was indexed by Google, we searched for these unique tags. The only unique tag found was the filename tag.
From this small study, we conclude the only PDF tags looked at by Google are the Title tag and filename.
When it comes to embedding non-html and non-image content on your website, you have a couple options with Google or Microsoft document viewer.
In my tests, MS’s office embed tool performs the best for embedding content, but you must “urlencode” the destination url. I also found MS fails on some urls so your milage may vary.
The MS viewer scores 99 and 96 on the Google Pagespeed tool for Mobile and Desktop, respectively.
Google Docs Viewer has a couple urls to load documents through. Pagespeed, Pingdom, and Websitegrader tests show the “gview” url performs slightly better.
Update 2018-09-16: In my latest tests, the scripts still score about the same. GView being a little bit lighter (4 fewer requets, 200Kb less)
No, this google search does not “expose thousands of confidential documents” via google. You’ve been click-baited in. All news sources claiming this seem to point to breakingnewsworldwidexposegoogleesensitivedocument.wordpress.com – seems trustworthy? I think not. commence downvoting of the article you first heard this on.