Ryan Full-tilt, full-stack developer, from JS -> SQL and everything in between.
5 min read

JSONViewer

I’ve added a new app to the Simple collection: JSONViewer.

It’s a native macOS app for viewing JSON files — think of it like Preview for images, but for .json files.

Features

JSONViewer is built with SwiftUI and includes:

  • Syntax highlighting — color-coded keys, strings, numbers, booleans, and null values
  • Expand/collapse — click the arrows to collapse objects and arrays
  • Error detection — invalid JSON shows an error banner with the problematic line highlighted
  • Copy to clipboard — one-click copy of the raw JSON
  • Light/dark mode — follows your system theme

Like MarkdownViewer, it’s lightweight, focused, and just works.

Download it →