How to remove empty lines?

1. Notepad++
1. Edit - LineOperators - Remove Empty Lines.
2. Ms Word
1. Ctrl+H (Replace) 
1. Find What    ^p^p
2. Replace With :  ^p
3. Excel - see https://www.extendoffice.com/documents/excel/4031-excel-delete-first-line-blank-lines-in-cell.html