Google's Preview tests

These are <iframe>s referencing the WTPDF 1.0 specification. The Table of Contents and other links within this PDF do work with Google's Preview! Default CSS styling is inline in the header of this HTML page, with certain properties then overriden locally with attributes. See this Mozilla page for <iframe> attributes.

Click here to attempt load a different PDF into the same <iframe> below by using its name as the target attribute. This will likely fail because of X-Frame-Options sameorigin browser policy settings!

The <iframe> below uses JavaScript to append a PDF fragment identifier (page=6) at the end of PDF URL. This fails to do the right thing and open to the page specified!:

URL will go here

Thus, Google's Preview does not:

appear to respect the CSS background-color of the <iframe> as the viewer background.
appear to be able to hide or disable the "pop out" icon in the top right corner of each Preview iframe (that will reopen the PDF in a separate tab/window).
appear to support RFC 8118 PDF fragment identifiers.
have clear licensing or information on the use/re-use of the PDF content sent to Google servers (e.g. for training AI).