3 Best JSON Editors for Mac in 2026 (Free & Paid Options)

The Mac App Store has OK JSON, a free native app built specifically for JSON. Most developers don't know it exists because they default to VS Code. VS Code works, but it's Electron-based and uses more memory than native Mac apps.

This guide covers three tools. OK JSON for quick viewing with a tree interface. Sublime Text for fast keyboard-driven editing. CodeRunner if you need to run scripts alongside JSON work. All three feel lighter than VS Code on macOS.

1. OK JSON

OK JSON is a native macOS app available on the App Store. Free. Built specifically for Mac, not a cross-platform port.

The interface feels like a Mac app should. It respects system Dark Mode automatically. You drop a file or paste JSON, and it shows you a tree view next to the raw text. Click any node to copy its path. Collapse sections to navigate nested data. The tree view is what makes this better than opening JSON in a text editor.

Apple Silicon performance is noticeably fast. Launch time is under a second. Files under 10 MB open instantly. The app uses native Mac frameworks, so memory usage stays low compared to Electron apps.

What it doesn't do: no plugin system, no schema validation, no scripting. You can make basic edits, but this is built for viewing and formatting. If you need to inspect an API response or format minified JSON quickly, OK JSON handles it without setup. That's the use case.

2. Sublime Text + Pretty JSON

Sublime Text with the Pretty JSON package is what you want if you edit JSON regularly as part of development work.

Install on Mac: brew install --cask sublime-text. Then install Package Control, open the command palette with Cmd + Shift + P, type "Install Package", search for "Pretty JSON", and install it. Takes two minutes.

The formatting shortcut is Cmd + Ctrl + J. Press it, and your JSON formats instantly. Minified JSON becomes readable. Malformed JSON shows you exactly where the error is. You can also sort keys alphabetically if you need consistent ordering.

Why Sublime on Mac: it's fast. Cold launch is under a second. Large files don't slow it down. Multi-cursor editing and project-wide search are faster than VS Code. The one-time purchase model means no subscription. The free version is fully functional with occasional purchase prompts you can dismiss.

What it doesn't have: no tree view. It's a text editor, so you're working with raw JSON. If you need visual navigation, use OK JSON alongside Sublime. If you're comfortable with keyboard-driven editing and want speed, Sublime is the best option on Mac.

3. CodeRunner

CodeRunner is a lightweight Mac-native code editor that supports 25+ languages. $15 one-time purchase.

The workflow is different from OK JSON or Sublime. You open a JSON file, edit it with syntax highlighting, then immediately run a Python or JavaScript script to process that data in the same app. No switching to Terminal. No separate script file. You write the transformation, run it, and see the output in one window.

This matters if you're working with JSON and scripts together. Students switching between languages. Developers who need to test data transformations quickly. Anyone who wants code execution without opening a full IDE.

The interface is clean and Mac-native. Tab-based file management. Split view support. Respects Dark Mode and system shortcuts. Performance on large files is good. It's lighter than VS Code but more capable than a basic text editor.

What it doesn't have: no plugin ecosystem, no tree view. You're editing raw text like Sublime. The tradeoff is built-in code execution, which neither OK JSON nor Sublime provides.

Quick Comparison

Recommendation

For most Mac developers: use OK JSON for inspecting and exploring JSON, VS Code for editing JSON as part of a larger project. If you want to minimize app switching and edit JSON frequently, Sublime Text handles both editing and quick validation in one fast app. If you're working with JSON and need to run transformation scripts in the same window, CodeRunner is worth the $15.

Using more than one tool is normal. OK JSON for quick inspections, Sublime for serious editing. They complement each other.

Frequently Asked Questions

Is there a native Mac app for viewing JSON?

Yes. OK JSON is a native macOS app available on the App Store for free. It's built specifically for Mac using native frameworks, not a cross-platform port. You get a tree view for navigating nested data, one-click formatting, and fast performance on Apple Silicon. It respects system Dark Mode and feels like a Mac app should. For quick JSON inspection without installing a full editor, it's the best native option.

Does VS Code work well for JSON on Mac?

Yes. VS Code has excellent JSON support with built-in formatting, schema validation, and extensions for advanced features. It's free and works fine on Mac. The tradeoff is that it's an Electron app, so it uses more memory and feels heavier than native Mac apps. If you're already using VS Code for development, its JSON workflow is solid. If you want something lighter and more Mac-native, OK JSON or Sublime Text are better choices.

What's the best JSON editor for MacBook with Apple Silicon?

OK JSON is optimized for Apple Silicon with native performance. Launch time is under a second, and it handles typical JSON files without slowdown. Sublime Text also runs well on Apple Silicon. CodeRunner is a native Mac app with good M1/M2/M3 performance. All three avoid Rosetta translation overhead, so they're faster than Electron-based editors on Apple Silicon Macs.

How do I format JSON files on Mac without installing VS Code?

Install Sublime Text with the Pretty JSON package. Open your JSON file, press Cmd + Ctrl + J, and it formats instantly. Or use OK JSON from the App Store. Drop your file in, and it formats automatically with a tree view. Both options are lighter than VS Code. For command-line formatting, install jq with Homebrew and run jq . file.json.

Is OK JSON free on Mac?

Yes. OK JSON is completely free on the Mac App Store with no in-app purchases, subscriptions, or feature limitations. You get the full app at no cost. It's built for quick JSON viewing and formatting, and it works offline. For a free native Mac app that handles JSON inspection, it's the best option available.

Related Reading

For broader coverage, the best JSON editors for Windows guide compares 9 tools. For quick formatting help, How to Format JSON in Notepad covers a simple setup, and How JSON Works explains the format at a technical level.

Editor-specific guides:

• Best JSON plugins for Sublime Text
• Best JSON plugins for Notepad
• Best JSON extensions for VS Code