JSON Assistant
JSON Viewer and Formatter
Only for Mac
Free
Mac
JSON Assistant is a fast, privacy-first JSON viewer and formatter for iOS and macOS.
Paste JSON, drop a file, or open from Share Sheet—then pretty-print, explore the tree, and save your snippets.
The UI uses a warm, high-contrast sepia theme that’s easy on the eyes without sacrificing legibility.
Why developers love it
• Instant Beautify and Compact views
• Clean tree explorer with Collapse/Expand All
• Raw ↔ Formatted side-by-side comparison.
• Saved snippets with names, timestamps, and quick delete
• Syntax highlighting tuned for readability
• On-device processing (no network) for speed & privacy
Great for
• Webhooks & API payloads.
• Server logs and debug output
• Inspecting large objects from the clipboard or files
Details
• Pretty-print and compact toggles
• Date/time stamps on saved entries
• Keyboard shortcuts
• Works offline; no account required
Privacy
All parsing happens on device. We do not collect your data.
Ratings & Reviews
This app hasn’t received enough ratings or reviews to display an overview.
Added JSON Path search, for both the sidebar as well as the Formatted view.
Also added a Submit Feedback button so you can report bugs, suggestions and everything else!
The developer, CoffeeDevs LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Coffeedevs LLC
- Size
- 3.2 MB
- Category
- Developer Tools
- Compatibility
Requires macOS 14.0 or later.
- Mac
Requires macOS 14.0 or later.
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2025 CoffeeDevs LLC