QLJSON

QuickLook plugin for .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.

Installation

Requires macOS Catalina (10.15) or higher.

brew install --cask relikd/tap/qljson
xattr -d com.apple.quarantine /Applications/QLJSON.app

or download from releases.

Features

• No dependencies
• Small app size (2 MB)
• Dark Mode
• Foldable structures
• Auto-reload on file change (in App)
• Customizable html output

How to customize CSS / JS

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

To modify the app preview, the procedure is mostly the same, except in step 3 the path is:

~/Library/Containers/de.relikd.QLJSON/Data/Documents/