Goal: Preview .docx Base64 (or blob) in Browser (javascript / html) in a simple <object .. /> container

This does preview a file, but my document paths are not public (I only funnel base64 or blobs to the end-browser) https://stackoverflow.com/a/27958186/2743486

<iframe src='https://view.officeapps.live.com/op/embed.aspx?src=http://remote.url.tld/path/to/document.doc' width='1366px' height='623px' frameborder='0'>This is an embedded <a target='_blank' href='http://office.com'>Microsoft Office</a> document, powered by <a target='_blank' href='http://office.com/webapps'>Office Online</a>.</iframe>

This is above file as base64 ... How do I use the "office viewer" to display it? https://jsfiddle.net/5cve3kLm/