You can't upload a workbook or attachment, but you should be able to use the html maker Addin. The link is in one of the sticky threads at the top of this forum.
A good start would be to read the aptly named thread "HTML Maker FAQ (How to show your sheet on the board)" that appears at the top of the Excel Questions forum (where you originally posted this).
We have a great community of people providing Excel help here, but the hosting costs are enormous. You can help keep this site running by allowing ads on MrExcel.com.
Allow Ads at MrExcel
Which adblocker are you using?
Disable AdBlock
Follow these easy steps to disable AdBlock
1)Click on the icon in the browser’s toolbar. 2)Click on the icon in the browser’s toolbar. 2)Click on the "Pause on this site" option.
Go back
Disable AdBlock Plus
Follow these easy steps to disable AdBlock Plus
1)Click on the icon in the browser’s toolbar. 2)Click on the toggle to disable it for "mrexcel.com".
Go back
Disable uBlock Origin
Follow these easy steps to disable uBlock Origin
1)Click on the icon in the browser’s toolbar. 2)Click on the "Power" button. 3)Click on the "Refresh" button.
Go back
Disable uBlock
Follow these easy steps to disable uBlock
1)Click on the icon in the browser’s toolbar. 2)Click on the "Power" button. 3)Click on the "Refresh" button.