Clean Schemes
HTML Cleaner for Excel provides several schemes for various ceaning demand.

Balance file size and appearance, result file will retain most original appearance, while file size may reduced greatly. HTML tables will look the same as before cleaning while file size will be reduced to a half. This mode is good for general cleaning of common Excel HTML files.
ExtremeGenerate pure html file, with only basic html tags. Lost all special styles,
retaining main structure, but you can link external CSS files to impose a
unified style for all.
This mode can reduce file size to 20% or more while
special styles for every cell will lost.
Customize detailed items below yourself, for advance user to deal wth special demand.
Notes
The extreme scheme is a special choice, it do a completely different cleaning, it doesn't analyze the file, just delete most styles simply like many other cleaning tools do. The file will be converted to basic HTML file, lost most styles in appearance.