There is no JsonViewer plugin in Notepad++
After installing through the plug-in, it was found to be unsuccessful after restarting
Then you can open the official website of the Notepad++ plugin project to download the plugin: Notepad++ Plugins - Browse Files at SourceForge.net
Select the dll file in Settings->Import->Import Plugin:
After importing and restarting, an error was reported: there is a problem with the version, and the 32-bit plug-in cannot be loaded
Because the computer is X64-bit, 64-bit download address: https://github.com/kapilratnani/JSON-Viewer/releases/download/v1.30a/NPPJSONViewer-x64.zip
After repeating the import operation, restart Notepad++, and it's done!