Cleaning Schemes
HTML Cleaner for Word provides several schemes for various cleaning requirements.
LightTake a minor cleaning which is most safe, for some special file or special user.

Balance file size and appearance, result file will retain most original appearance, while file size may reduced greatly.
AdvancedAdd table optimization to medium scheme.
ExtremeGenerate pure html file, with only basic html tags. Lost all special styles, but basic structure will remain.
CustomizeCustomize detailed items below yourself.
Notes
Light and Medium schemes are very safe, they can preserve nearly 100% of your original HTML file while reduce file size from 30% to 50%.
The extreme scheme is a special choice, which will do a complete different cleaning, just deleting most styles simply, like many other cleaning tools do.