You can also save your project as a Web page. To do this, click the File menu, choose Send to, and click Save As Web Page.

You will then be prompted to save your file as an HTML file. Note that you can also perform this action from the Save As dialog.

Remember that by default, the Export wizard comes up when you save a file as any type other than .mpp. You will have to walk through this wizard (or at the very least, click Finish) to finish creating your HTML file.