How to make a tree style spreadsheet ( like notebark )?

[bspkumar]

I would like to make a spreadsheet where we can insert the data in tree style
as it like in notebark software. I would like to edit this spreadsheet
online. I can use notebark however, we can not view/edit notebark ( .nbf file
) onlline.

Could you suggest me alternate solution to this.

 

[JoAnn Paules]

No clue what notebark is.