There is the "Compare" plugin. You can install it via Plugins -> Plugins Admin... (or Plugins -> Plugins Manager in older versions of Notepad++) in the top menu.

Alternatively you can install a specialized file compare software like WinMerge.

Answer from Lars Fischer on Stack Overflow
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Oreate AI
oreateai.com › blog › comparing-two-files-in-notepad-without-plugins-a-simple-guide › aa74eedbfea767f2b58f9d8036ee15e5
Comparing Two Files in Notepad Without Plugins: A Simple Guide - Oreate AI Blog
January 15, 2026 - Next, drag and drop the two files you want to compare directly into the editor. You’ll see both files open as separate tabs at first, but we need them side by side for an effective comparison.
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There is the "Compare" plugin. You can install it via Plugins -> Plugins Admin... (or Plugins -> Plugins Manager in older versions of Notepad++) in the top menu.

Alternatively you can install a specialized file compare software like WinMerge.

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Update:

  • for Notepad++ 7.5 and above use Compare v2.0.0
  • for Notepad++ 7.7 and above use Compare v2.0.0 for Notepad++ 7.7, if you need to install manually follow the description below, otherwise use "Plugin Admin".

I use Compare plugin 2 for notepad++ 7.5 and newer versions. Notepad++ 7.5 and newer versions do not have plugin manager. You have to download and install plugins manually. And YES it matters if you use 64bit or 32bit (86x).

So Keep in mind, if you use a 64-bit version of Notepad++, you should also use a 64-bit version of the plugin, and the same is valid for 32-bit.

I wrote a guideline how to install it:

  1. Start your Notepad++ in administrator mode.
  2. Press F1 to find out if your Notepad++ is 64bit or 32bit (86x), hence you need to download the correct plugin version. Download Compare-plugin 2.
  3. Unzip Compare-plugin in a temporary folder.
  4. Import the plugin from the temporary folder.
  5. The plugin should appear under the Plugins menu.

Note:
It is also possible to drag and drop the plugin .dll file directly in the plugin folder.
64bit: %programfiles%\Notepad++\plugins
32bit: %programfiles(x86)%\Notepad++\plugins

Update Thanks to @TylerH for this update: Notepad++ Now has "Plugin Admin" as a replacement for the old Plugin Manager. But this method (answer) is still valid for adding plugins manually for almost any Notepad++ plugins.

Disclaimer: the link to this guideline refer to my personal website.

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Reddit
reddit.com › r/linuxmint › notepad++ replacement (need something that is similar to the compare plugin to compare two files w/color coding)?
r/linuxmint on Reddit: notepad++ replacement (need something that is similar to the compare plugin to compare two files w/color coding)?
November 21, 2022 -

Basically I'm just doing simple checks to see the difference between two files, specifically in my case I'm using arkenfox user.js for firefox. I like to compare the update to the old version to see what changed and see if I need to make any updates to my user-overrides.js

The color coding also helps immensely. And seeing the files side by side with the changes highlighted, while being able to edit them if needed, helps too. (I've also used it to see changes I've made in user-overrides.js).

Edit: I'm very new to linux and because everything is new I don't have that sense of what to try first, like I do with windows. With mac or android I have a better sense as well, at least have an idea with those of what to search for or a place to start. With linux it's so unfamiliar and new to me, just kinda very overwhelming and too many things to process at once. I just kinda blank out for a while before I come up with an idea.

I figured it out though, I installed Kompare to use with Kate and that seems to be working well. It was a little confusing and counter intuitive process to what I'm used to. I was thinking maybe I need to install plugins, rather than pull programs from the software manager, and I don't always know what to look for! I wasn't certain it would work since it's for KDE and I'm on Cinnamon (keep forgetting about the DE, I'm used to just one desktop environment), I've only quickly checked a file, not done much with it yet and it worked for what I needed.

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Alphr
alphr.com › home › how to compare two files with notepad
How to Compare Two Files With Notepad
June 5, 2023 - There are many reasons why you would want to compare two different versions of a file. For example, if you’re copying a file from one folder to another, packet loss and data corruption might happen along the way. To ensure that your file is indeed similar to its original version, you must perform some comparison. Notepad++ is a good tool for comparing files. Unfortunately, the functionality isn’t built into the software. For that reason, you’ll need to install the Compare plugin for the process to yield any meaningful results.
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Notepad++ Community
community.notepad-plus-plus.org › topic › 15420 › compare-files
Compare Files | Notepad++ Community
March 21, 2018 - It would need good facilities for highlighting the lines that differ between the two files, the characters that are different between the two lines, ignoring whitespace changes and/or changes within comments. Beyond Compare is pretty good in ...
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Notepad++ Community
community.notepad-plus-plus.org › topic › 25461 › comparing-and-editing-files
Comparing and editing files | Notepad++ Community
March 18, 2025 - Compare the two files, select View | Diff Context | 0 Lines and you will see only the lines that are different. Click in the side you want to copy, select all and copy (Ctrl+A then Ctrl+C); you can then paste the result into a new Notepad++ tab.
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Medium
medium.com › @wepypixel › compare-two-files-in-notepad-in-5-easy-steps-pypixel-fdbb99c47b44
Compare Two Files in Notepad++ in 5 Easy Steps | PyPixel | by Stilest | Medium
December 7, 2023 - If you don’t want to compare two files in Notepad++ without a plugin, there’s a way to open the files side by side to see the changes.
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Sivo
hub.sivo.it.com › home › text file comparison › how to compare two text files in notepad++ without a plugin?
How to compare two text files in Notepad++ without a plugin? | Text File Comparison – Sivo
September 29, 2025 - Published in Text File Comparison 4 mins read Sep 29, 2025 · While Notepad++ does not offer a built-in visual diff tool without a plugin, the most effective and widely used method to compare two text files directly within Notepad++ involves the popular Compare Plugin.
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The Windows Club
thewindowsclub.com › the windows club › general › how to compare two files in notepad++
How to compare two files in Notepad++
December 14, 2024 - Notepad++ doesn’t come with a built-in feature to compare two files, but you can use a free Notepad++ plugin called Compare to make it possible.
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YouTube
youtube.com › watch
Comparing text files in NotePad++ || Quick and Easy way to compare text files - YouTube
Hello Friends, In this tutorial we will learn to compare text files in notepad ++. This is quite easy to compare files in notepad++, only need to install a p...
Published   June 12, 2025
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Windows Report
windowsreport.com › how to › 2 ways to compare two files in notepad++
2 Ways to Compare Two Files in Notepad++
October 4, 2023 - When you compare two files in Notepad++ without a plugin, the results aren’t as clear, requiring more manual effort and time. Besides, the lack of color coding and symbols might result in missing important differences.
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TestMu AI Community
community.testmu.ai › ask a question
How can I notepad++ compare two files to find differences between them? - TestMu AI Community
April 13, 2025 - I want to notepad++ compare two files to check for differences. Earlier versions had the Alt+D shortcut for this, but in version 6.6.8, I can’t find that option. Which Notepad++ version is most stable for comparing files…
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Leosplaykingdom
leosplaykingdom.com.au › compare-two-files-using-notepad-22
Compare Two Files Using Notepad++ - Play Center Melbourne
April 2, 2023 - If you’ve lost or deleted an important Notepad file, let’s take a look at a few different ways of recovering it. If none of these ways work, your last resort is to contact a data recovery service provider for help. They can assist you in recovering your lost data. After the scan is complete, you will see the items found. If you use an IDE like CLion, right click on the file you want to compare, you may see the message compare with.
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SourceForge
sourceforge.net › projects › npp-compare
Notepad++ Compare plugin download | SourceForge.net
Switch between models without switching platforms. ... This plugin is interesting but ComparePlus is better and from the same editor. ... Does not work with 64bit Notepad++ Besides, the docs recommend installing the plugin to C:\Program Files - we do not install any software, except system, ...
Rating: 4.1 ​ - ​ 40 votes