Exporting Excel data as HTML starts with having a file with data, such as this:
Select all the data, and then click on File.
Click Save as and browse to the folder where you want to save the file.
Publishing the file
Give the file a title beside file name (1). Choose web page in the Save as type (2), choose selection (3), and press publish (4).
Check the AutoRepublish every time this workbook is saved, and then click publish.