What program can be used to automatically remove spaces in text?

Question

Text editors

Found this service for this. en.texthandler.com/text-tools/remove-line-breaks
Is there something more modern and perfect for this purpose?

Answer 1

This can be done completely automatically with sed .
sed -i '/^\s*$/d' my_messy_text_file.txt

Answer 2

notepad++

Answer 3

https://atom.io/packages/delete-whitelines