How to remove duplicate words in Notepad++

In this article, we will step by step go through how to remove duplicate words in Notepad++. Notepad++ Download

Step 1: Opening the document in Notepad++

Launch Notepad++.
Open the file where you want to remove duplicate words. To do this, select File > Open and specify the path to your file.

Step 2: Opening the replace window

Step 3: Using regular expressions

In the replace window, check Match case if you need case sensitivity.
Check Regular expression at the bottom of the window to enable regular expressions.

Step 4: Entering the search pattern

In the Find field, enter the following regular expression:

\b(\w+)\s+\1\b

\b denotes a word boundary.
(\w+) denotes any sequence of letters and numbers (word), captured in a group.
\s+ denotes one or more spaces.
\1 refers to the first captured group (repeating word).

Step 5: Replacing duplicate words

In the Replace with field, enter $1. This means you want to replace duplicate words with the first occurrence.
Click the Replace All button to replace all duplicate words in the document.

Now your document is cleaned of duplicate words.