We are far away from offline mode. May be 2-3 years later thing, if we survive till that time.

Btw, did you check OpenCV morph line detection? It will help to auto detect the evident cell/row boundaries - thus reducing human effort

I did a bit, but there are tables that simply don't have any lines. Given that human beings are just so much better at detecting tables than AI, I figured maybe the solution is to help people quickly draw the table they see, rather than tweaking algorithm -- hence this new product.