How do I bulk delete the empty line in TXT file?

How to bulk delete a TXT file in the empty line? Below, to share a brief introduction of the method:

@echo off

Set N=1

: 3

If exist D:new_%n%.txt (set/a N+=1&goto 3)

Set file=%1

for/f "Usebackq delims="%%i in ("%file%") Do (

Echo%%i >>d:new_%n%.txt

)

echo Processing is complete!

Start "" D:new_%n%.txt

Pause>nul

Save as "delete blank line. Bat" and then drag the text you want to handle blank lines to the "delete blank row. Bat" icon, which will be processed automatically, resulting in the text you want in D: