• Jsoneditor is a browser-based editor that you can deploy locally or use the ad-sponsored online version provided by the author. It's handy for small JSON files, and I find it the easiest and most feature-full. It will highlight broken json, but it's not a 100% compatible validator like https://jsonlint.com/ because, for example, it treats raw tabs as valid within strings although this is not allowed by the JSON spec.

  • JSONMate seems to be a usable open-source project with an online editor which probably won't be able to handle large files, but you can fork it on github, adapt to your needs and run it locally.

  • Intellij Idea and derivatives have decent JSON support, but large files take time to load.

  • SublimeText is also usable for JSON if you install the plugins for beautifying and extra features.

For windows XMLMarker does a good job as an XML and JSON visualizer, but the last version which added JSON support is a limited trial.

Disclaimer: I am not affiliated with any of these tools, authors or projects.

Answer from ccpizza on Stack Exchange
🌐
Jsonviewer
jsonviewer.app
JSON Viewer
Download Β· Version 1.2.2 Β· Requires macOS 10.14 or later Β· Visualize Β· Easily read JSON with syntax highlighting in a familiar color scheme Β· Interact Β· Navigate through large datasets by expanding and collapsing nodes Β· Format Β· Prettify or minify JSON in a single click Β·
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App Store
apps.apple.com β€Ί us β€Ί app β€Ί ok-json-viewer-formatter β€Ί id1576121509
OK JSON - Viewer & Formatter App - App Store
Download OK JSON - Viewer & Formatter by Anybox LTD on the App Store. See screenshots, ratings and reviews, user tips, and more apps like OK JSON - Viewer &…
Rating: 0 ​
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App Store
apps.apple.com β€Ί us β€Ί app β€Ί json-viewer-simple β€Ί id6526147266
Json Viewer Simple App - App Store
Download Json Viewer Simple by Felipe Reitz on the App Store. See screenshots, ratings and reviews, user tips, and more apps like Json Viewer Simple.
Rating: 5 ​ - ​ 1 votes
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Okjson
okjson.app
Scriptable JSON Formatter for macOS - OK JSON
Apple Silicon & macOS Tahoe ready! The ultimate JSON formatter for your Mac.
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Dadroit
dadroit.com β€Ί download
Download – Dadroit JSON Viewer
Download Dadroit for Windows, macOS, and Linux. Rapidly view large JSON files with advanced parsing & optimal memory. Download for free now!
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Dadroit
dadroit.com β€Ί blog β€Ί json-viewer-mac
6 Best JSON Viewer Tools for macOS
November 22, 2023 - JSON Wizard is a macOS tool designed for efficient JSON data management. It offers live syntax checking and a tabbed tree view, providing clear navigation and detailed insights into each field and its type.
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GitHub
github.com β€Ί youknowone β€Ί VisualJSON
GitHub - youknowone/VisualJSON: JSON pretty-viewer for OS X. Β· GitHub
VisualJSON is simple JSON pretty-viewer for Mac OS X. Download recent VisualJSON on Appstore.
Author Β  youknowone
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Homebrew
formulae.brew.sh β€Ί cask β€Ί json-viewer
json-viewer β€” Homebrew Formulae
Cask code: json-viewer.rb on GitHub Β· Current version: 1.2.2 Β· Requirements: macOS >= 10.15 Β·
Find elsewhere
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Informer
macdownload.informer.com β€Ί advice β€Ί mac json viewer
Mac Json Viewer - download for Mac
Download Mac Json Viewer - real advice. JSONpad and 3 more programs.
Rating: 5 ​ - ​ 1 votes
Top answer
1 of 4
7
  • Jsoneditor is a browser-based editor that you can deploy locally or use the ad-sponsored online version provided by the author. It's handy for small JSON files, and I find it the easiest and most feature-full. It will highlight broken json, but it's not a 100% compatible validator like https://jsonlint.com/ because, for example, it treats raw tabs as valid within strings although this is not allowed by the JSON spec.

  • JSONMate seems to be a usable open-source project with an online editor which probably won't be able to handle large files, but you can fork it on github, adapt to your needs and run it locally.

  • Intellij Idea and derivatives have decent JSON support, but large files take time to load.

  • SublimeText is also usable for JSON if you install the plugins for beautifying and extra features.

For windows XMLMarker does a good job as an XML and JSON visualizer, but the last version which added JSON support is a limited trial.

Disclaimer: I am not affiliated with any of these tools, authors or projects.

2 of 4
3

Checkout Jason, although it appears to be no longer maintained since Osx 10.7, I just opened a JSON in it with Osx 10.11 and it works ok.

Please Note: since it is no longer maintained it is likely going to be unreliable.

Alternatively, I have opted for an online browser-based JSON editor:

  • http://jsoneditoronline.org/

It is surprisingly fast, allowing you to browse the tree, search values, edit values, insert values, reorder values, even duplicate values. You can even drag and drop stuff around to really get creative :) Unfortunately, you can't see the filename of the json you are editing, but you can open up new browser tabs for multiple json file editing at once.

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GitHub
github.com β€Ί DevUtilsApp β€Ί jsonformatter.app
GitHub - DevUtilsApp/jsonformatter.app: JSON Formatter offline macOS app
πŸš€ Download | 🎬 Demo & Screenshots | πŸ“ View source Β· You can format your JSON strings from anywhere in your macOS (terminal, in email, web browser,...).DevUtils will inspect your clipboard content and automatically select the JSON Formatter/Validator tool if the content is a valid JSON.
Starred by 7 users
Forked by 2 users
Languages Β  HTML
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Jless
jless.io
jless - A Command-Line JSON Viewer
Expand and collapse Objects and Arrays to grasp the high- and low-level structure of a JSON document. jless has a large suite of vim-inspired commands that make exploring data a breeze. jless supports full text regular-expression based search. Quickly find the data you're looking for in long String values, or jump between values for the same Object key. jless currently supports macOS and Linux and can be installed using various package managers.
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Reddit
reddit.com β€Ί r/macos β€Ί nice json editor for mac?
r/MacOS on Reddit: Nice JSON Editor for Mac?
December 28, 2021 -

Hello guys. So I've been using Smart JSON Editor as my JSON editor of choice for the last couple of years.

However this app has not been updated for like 3 years and thus it's not native for ARM (now I got an M1 Pro MacBook Pro).

I know it's not a big deal to run it in Rosetta (especially something like a JSON editor), but I would rather use an app that's been actively developed (this app was last updated when macOS Mojave was released).

Recommendations with a nice and modern UI would be more appreciated, but at this point I doubt they even exist hahaha

🌐
Dadroit
dadroit.com
Dadroit JSON Viewer
Dadroit JSON Viewer is designed to efficiently handle big JSON. View and convert large JSON on Windows, macOS, and Linux. Simplify JSON tasks today!
🌐
Jayson
jayson.app
Jayson
Use the share sheet extension to view JSON from other apps, including Safari.
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JSON Formatter
jsonformatter.org β€Ί 1fa9f4
awesome
Free JSON Formatting Online and JSON Validator work well in Windows, Mac, Linux, Chrome, Firefox, Safari, and Edge.
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Reddit
reddit.com β€Ί r/macapps β€Ί ok json - a native mac app to format, view, query json
r/macapps on Reddit: OK JSON - A native Mac app to format, view, query JSON
August 31, 2021 -

OK JSON is my new app that I've been working on in the last couple months.

Due to the recent events with regard to native apps switching to Electron, I would like to emphasize that OK JSON is built with AppKit, with the exceptions of the In-App purchase page and preferences, which are built with SwiftUI.

OK JSON a JSON formatter and viewer, well suited for developers who need to work with JSON frequently, especially web developers. With OK JSON, you can view JSON in a tree view with beautiful syntax highlight.

Also, for those who care about privacy, maybe it's time to stop pasting your data on a random website. This one doesn't collection any of your data.

Features:

  1. Format JSON in Pasteboard with keyboard shortcut.

  2. View JSON in tree view with beautiful syntax highlight.

  3. Query with JSONPath and compare with JSON Patch.

  4. Various ways to open JSON documents.

Main Window

JSONPath Window More Features

Websites:

OK JSON - Format and View JSON with Native Mac App

Download OK JSON on Mac App Store

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Smartjsoneditor
smartjsoneditor.com
Smart JSON Editor
Smart JSON Editor - json editor for OSX macOS, rest connection to api, jQuery helper, Http Server, JSON Path, json editor and more, Smart Objects, Quick Look, Value Transformers, API Requests
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GitHub
github.com β€Ί ErikKalkoken β€Ί janice
GitHub - ErikKalkoken/janice: A desktop app for viewing large JSON files. Β· GitHub
Export parts of a JSON file into a new file or to clipboard ... To run Janice just download and unzip the latest release to your computer. Janice ships as a single executable file that can be run directly.
Author Β  ErikKalkoken