How to keep only the necessary part of the text in a line in Notepad++

One of the useful features of Notepad++ is the ability to keep only the necessary part of the text in a line. Notepad++ Download

• Press Ctrl+H to open the Find and Replace dialog box.
• Go to the Replace tab.
• Enable Regular expression mode at the bottom of the dialog box.

Example 1: Suppose you have lines like:

123abc456
789def012
345ghi678

And you want to keep only the part of the text with letters. To do this:

• In the Find field, enter:

\d+

• Leave the Replace with field empty.
• Click Replace All.

After that, the lines will look like this:

abc
def
ghi

Example 2: Suppose you have lines like:

abc_123_def
ghi_456_jkl
mno_789_pqr

And you want to keep only the text after the first underscore and before the second underscore. To do this:

• In the Find field, enter:

^[^_]+_([^_]+)_.*$

• In the Replace with field, enter:

\1

• Click Replace All.

After that, the lines will look like this:

123
456
789

Now you know how to keep only the necessary part of the text in a line and remove the rest.