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No. 26 of 29 ·JSON Tools

JSON Viewer

Mac

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Freedom report

One barScore 5.1

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely1 of 6 device platforms
DocumentedThinly documented

JSON Viewer is ranked #26 of 29 in JSON tools on Freedom251. It runs on macOS. There is a free plan.

JSON Viewer plans and pricing

Free Free 100% free · no subscription or in-app purchases · download under 5 MB jsonviewer.app · 4 Oct 2026

Compared on JSON tools

Free plan: Yes
Available platforms: macOS

Best JSON Viewer alternatives

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The record

Purpose: JSON Viewer is a native Mac app for visualizing, validating, and formatting JSON datasets.
Syntax highlighting: It uses syntax highlighting to make JSON easier to read.
Navigation: Users can expand and collapse nodes to navigate large datasets.
Formatting: The app can prettify or minify JSON in one click.
Validation: The app highlights invalid JSON syntax automatically.
Offline use: The app works offline and processes everything on the Mac.
Privacy: The maker says the app has no tracking or data mining.
Technology: The native Mac UI is built with Swift and Cocoa.
Appearance: The app supports dark mode and follows the system appearance.
Download size: The download is less than 5 MB.
Current requirement: Version 2.0.0 requires macOS 26 or later.
Older macOS support: The maker offers version 1.2.2 for macOS 10.14 or later.
Support: The site provides a support and feedback contact link.
Maker location: The site says the app was made in Montreal.
Price from: Free

Where it ranks on Freedom251

Best JSON Tools in 2026#26 of 29

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Sources

jsonviewer.app· checked 4 Oct 2026
jsonviewer.app/v1/· checked 4 Oct 2026