QLJSON

Just a simple tool for QuickLook-ing .json files.

I have been using QuicklookJSON until recently but it has no support for macOS 15. I copied some parts of QuickJSON but did through away almost everything. The remaining code was heavily refactored.

Features

Dark Mode
Foldable structure
Customizable CSS / JS

How to customize CSS / JS

Right click on the app and select "Show Package Contents"
Go to PlugIns and repeat "Show Package Contents" on the Preview extension.
Copy Contents/Resources/style.css (or script.js)
Open ~/Library/Containers/de.relikd.QLJSON.Preview/Data/Documents/
Paste the previous file and modify it to your liking (e.g. change text colors)