CSS or JavaScript
Makes sense, although you don't need the grid to support that natively, per se. Why not just capture the change event and mask the field via CSS or JavaScript?
i am having a grid where admin can edit user passwords. On edit mode i am using an input with type="password" and after editing i want to display the edited password(like ******) in a grid column.
Can you please clarify what you're looking for here? If this is for edit fields, why wouldn't an input with type="password" do?