I have a web application where people can upload PDF files and I'm reviewing it online with Google Docs Viewer API, from a back-end web application. I can get many different PDF sources, because of that.

Some PDF are not correctly displayed: some text is missing. I can see the missing text when I open the PDF file with an "offline" PDF viewer, say Adobe Reader.

Any advice on this?

How to understand/debug/modify the PDF on-the-fly to make it OK?

I found an example of an incorrect PDF, the "file" command says it's a 1.4 PDF version. Google Docs shows correctly some 1.7 files I have. I first thought it could be related to a very recent PDF version, but it seems not. (I read Which versions of the PDF standard does Google Docs support? before) So what?

I can provide someone with an incorrect file if needed.

  • any idea someone?
    – michauko
    Commented Nov 8, 2012 at 13:03
  • I guess it's not very helpful right now, but you can compare the same pdf in different versions and possibly different export settings, and by eliminating understand which versions are supported. Commented Jul 2, 2018 at 22:39


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Browse other questions tagged or ask your own question.