How to Save Excel 2013 Worksheets as HTML Files
Click the Save button to save the file without opening it in your web browser. Otherwise, click the Publish button so that you can see the web page in your browser right after saving it.
If you click the Save button, Excel closes the Save As dialog box, saves the file to disk, and returns to the Excel window (that now contains the HTML version of your workbook or worksheet in place of the original .xls file).
If you click the Publish button to view the new HTML file in your browser, Excel opens the Publish as Web Page dialog box, where you select the Open Published Web Page in Browser check box before clicking the Publish button.