I use Aspose.Cells to convert Excel files to HTML.
HTML is significantly increased in size compared to the original document ()
example.zip (2.0 MB)
image.png (9.6 KB)
I found that Aspose duplicates styles for the td in HTML, which can lead to an increase in size.
image.png (4.5 KB)
I believe that optimization is needed here.
Probably the CSS class should be generated and used in places with the same styling.
I have a 10MB Excel document that is 300MB after conversion.