Got it, let's fix this duplicate line problem for your 32-bit Notepad++. Since the old go-to tools like Plugin Manager and TextFx Tools aren't available, we've got two reliable approaches that work with the current version of Notepad++:

Built-in Regular Expression Method (No Plugins Needed) #

This is my go-to quick fix when I don't want to install extra plugins. Here's how to do it:

• First, sort your lines so duplicate lines are adjacent (this is key for the regex to work): Go to Edit > Line Operations > Sort Lines Lexicographically Ascending.
• Open the Replace dialog with Ctrl+H.
• Switch to the Regular expression mode (make sure the ". matches newline" box is unchecked).
• In the "Find what" field, paste this pattern:

  ^(.*?)\r?\n\1$
  

• In the "Replace with" field, enter:

  \1
  

• Click Replace All. If you have multiple consecutive duplicates (3+ identical lines), you might need to click "Replace All" a few times to clean them all up.
• Pro tip: For one-shot removal of all consecutive duplicates (even 3+ lines), use this find pattern instead:

  ^(.*?)\r?\n(\1\r?\n)+
  

  Replace with \1—this will collapse any number of consecutive duplicates into a single line.

Use Notepad++'s Official Plugins Admin #

Notepad++ replaced the old Plugin Manager with Plugins Admin, which works for 32-bit versions too. Here's how to get a dedicated duplicate line remover:

• Open Notepad++, then go to Plugins > Plugins Admin.
• In the search bar, type "Remove Duplicate Lines" (or look for "Duplicate Lines Remover").
• Check the box next to the plugin, click Install, and restart Notepad++ when prompted.
• Once installed, select the text you want to clean (or press Ctrl+A for the whole document), then head to Plugins > [Plugin Name] > Remove Duplicate Lines. Most of these plugins let you choose to keep the first occurrence, remove all duplicates, or even remove duplicates without sorting first.

内容的提问来源于stack exchange，提问作者Theoutsider