You have to use the plugin manager of Notepad++ and search for the JSON plugin. There you can easily install it.
This answer explains it pretty good: How to reformat JSON in Notepad++?
Answer from Kiril on Stack OverflowSourceForge
sourceforge.net › projects › jsminnpp
JSToolNpp download | SourceForge.net
Download JSToolNpp for free. A JavaScript tool for Notepad++ and Visual Studio Code. A JavaScript (JSON) tool for Notepad++ (formerly JSMinNpp) and Visual Studio Code. * Douglas Crockford's JSMin algorithm to minimize JavaScript code.
GitHub
github.com › sunjw › jstoolnpp
GitHub - sunjw/jstoolnpp: A JavaScript (JSON) tool for Notepad++ (formerly JSMinNpp) and Visual Studio Code. · GitHub
A JavaScript (JSON) tool for Notepad++ (formerly JSMinNpp) and Visual Studio Code. - sunjw/jstoolnpp
Starred by 306 users
Forked by 28 users
Languages JavaScript 98.8% | C++ 0.7% | C 0.3% | PHP 0.1% | Python 0.1% | CSS 0.0%
Sunjw
sunjw.us › jstool › npp
JSTool - A JavaScript tool for Notepad++
Source code: https://github.com/sunjw/jstoolnpp · All files: https://sourceforge.net/projects/jsminnpp/files/ Help · Install JSTool from Plugin Manager · Run Notepad++. Open menu: "Plugins" - "Plugin Manager" - "Show Plugin Manager". If you can't find "Plugin Manager" in Notepad++ menu, ...
GitHub
github.com › SkyN9ne › JSToolNpp
GitHub - SkyN9ne/JSToolNpp: A tool / plugin for Notepad++ and Visual Studio Code adding features for JavaScript and JSON. Formerly called JSMinNpp · GitHub
A tool / plugin for Notepad++ and Visual Studio Code adding features for JavaScript and JSON. Formerly called JSMinNpp - SkyN9ne/JSToolNpp
Author SkyN9ne
Softpedia
softpedia.com › windows › office tools › text editors › jstoolnpp
JSToolNpp - Download - Softpedia
Download JSToolNpp 25.11.16 - JavaScript plugin for Notepad++, which enables you to easily format JavaScript and JSON source code directly from the text editor
SourceForge
sourceforge.net › home › open source software › software development › code generators › jstoolnpp › files
JSToolNpp - Browse Files at SourceForge.net
Install "JSTool" from Plugin Manager in Notepad++. Or download it from http://sourceforge.net/projects/jsminnpp/ and copy JSMinNpp.dll to plugin directory of Notepad++.
SourceForge
sourceforge.net › home › open source software › software development › code generators › jstoolnpp
Download JSToolNPP.1.2205.0.uni.64.zip (JSToolNpp)
A JavaScript tool for Notepad++ and Visual Studio Code
Sunjw
sunjw.us › jstoolnpp
JSTool - A JavaScript tool for Visual Studio Code
Open you JavaScript source code file in Notepad++.
Techtown
atechtown.com › home › text editors › jstool plugin for notepad++ – features, download, how to install and use
JSTool Plugin for Notepad++ – Features, Download, How to Install and Use - Techtown
December 28, 2022 - It is actually a Javascript plugin that works on JSON as well. So let’s discuss this plugin in detail and see how to install and use it. ... JSToolNpp is a Javascript Plugin for Notepad++ to minimize and format JavaScript code.
SourceForge
sourceforge.net › home › open source software › software development › code generators › jstoolnpp › files
JSToolNpp - Browse /Src at SourceForge.net
A JavaScript tool for Notepad++ and Visual Studio Code
SourceForge
sourceforge.net › home › open source software › software development › code generators › jstoolnpp › files
JSToolNpp - Browse /Vsc at SourceForge.net
Install "JSTool" from Plugin Manager in Notepad++. Or download it from http://sourceforge.net/projects/jsminnpp/ and copy JSMinNpp.dll to plugin directory of Notepad++.
SourceForge
sourceforge.net › home › open source software › software development › code generators › jstoolnpp
Download JSToolNPP.1.2503.0.uni.64.zip (JSToolNpp)
A JavaScript tool for Notepad++ and Visual Studio Code
SourceForge
sourceforge.net › home › browse open source › software development › code generators › jstoolnpp
Download JSToolNPP.1.2006.0.uni.32.zip (JSToolNpp)
A JavaScript tool for Notepad++ and Visual Studio Code
Google Code
code.google.com › archive › p › jstoolnpp
Google Code Archive - Long-term storage for Google Code Project Hosting.
Archive · Skip to content · The Google Code Archive requires JavaScript to be enabled in your browser · Google · About Google · Privacy · Terms
SourceForge
sourceforge.net › home › open source software › software development › code generators › jstoolnpp
Download JSToolNPP.25.11.16.uni.64.zip (JSToolNpp)
November 26, 2025 - JSToolNpp A JavaScript (JSON) tool for Notepad++ (formerly JSMinNpp) and Visual Studio Code. * Douglas Crockford's JSMin algorithm to minimize JavaScript code. * My own algorithm to format JavaScript code. * A JSON tree viewer. The JSON tree viewer for Notepad++ can handle >10MB JSON file easily.
SourceForge
sourceforge.net › home › open source software › software development › code generators › jstoolnpp › files
JSToolNpp - Browse /Uni at SourceForge.net
A JavaScript tool for Notepad++ and Visual Studio Code
SourceForge
sourceforge.net › home › browse open source › software development › code generators › jstoolnpp
Download JSToolNPP.1.1904.0.uni.64.zip (JSToolNpp)
A JavaScript tool for Notepad++ and Visual Studio Code
OnWorks
onworks.net › home › software › windows › app jstoolnpp
JSToolNpp download for Windows
JSToolNpp download for Windows
JSToolNpp free download Windows app and run it online in OnWorks over OS online like Ubuntu, Fedora, Debian, Kali OS wine