Enter TransMagic's 3D web page publishing feature. This video briefly demonstrates using TransMagic to publish a STEP file to HTML and open with Windows Internet Explorer.
Saving a CAD model or assembly as an HTML page from TransMagic will create (at least) two linked files using the file name given - one HTML file which can be loaded from Windows Internet Explorer & an associated HOOPS ".hsf" file containing the actual 3D parts which use the HTML as a "container". Simply, zip or unzip both files together, upload send in email or save to the same hard disk (or server) location and open the HTML from Internet Explorer with the .HSF file present in the same directory. You can view this video's actual HTML page for yourself HERE.
Of course, HTML code can be edited to change colors, add a company logo or product information and web links as desired - so it is far more effective in making product presentations than a binary viewer - and transmits far more successfully in email. It also adds the possibility (perhaps also using TransMagic's batch-convert option) to publish 3D part catalogs on a website that visitors can navigate and "inspect" in real time 3D.