How do I render a Document (.doc, .docx, .csv, .xls, .xlsx) in the browser using JavaScript? - Stack Overflow

if you only need to display the Document, but don't need to edit it, you can use Google Documents' Viewer via an <iframe> to display a remotely hosted .doc/.docx.

<iframe src="https://docs.google.com/gview?url=http://remote.url.tld/path/to/document.doc&embedded=true"></iframe>