what is max file size for preview?

Hi John,

Google’s viewer can’t handle large files due to the nature of how it operates. You must adequately compress the files to have good results. We don’t have access to the file size limit. It varies from place to place based on configuration and network condition. We believe that allowed file size is determined by the memory Google has allocated to PHP.

PDFs can be optimized and compressed. In extreme cases, they can be broken up into smaller files. Please try aiming in the 8-10MB maximum range, if you must use large files.

After extensive experimentation, it seems that the preview display limit is 2MB for me, here and now. Bigger than that and they don’t display using Embed Any Document (though I understand that it’s not your issue, but Google’s). That means that my 30MB PPT presentation (already maximally compressed) must be split into 15 pieces, which is not workable. So I saved it out as jpegs and uploaded all those to a webpage instead.

Question: Is using Microsoft better than Google for this purpose? I.e., does it accommodate larger files in the preview display mode?

It looks like Microsoft is better for this purpose.
Check – https://dev.awsm.in/innovations/testing-large-file/
This 6.15mb file works well with Office Online.