JSON Assistant icon
JSON Assistant icon

JSON Assistant

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A powerful macOS application designed for developers who work with JSON daily. Format and beautify messy JSON, validate syntax instantly, organize snippets in collections, convert between JSON and other formats, and quickly search through your saved snippets.

JSON Assistant screenshot 1

Cost / License

  • Free
  • Proprietary

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Platforms

  • Mac
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JSON Assistant was added to AlternativeTo by Paul on and this page was last updated .

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Download from Mac App Store

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What is JSON Assistant?

Beautiful JSON viewer/formatter for macOS. Paste or drop a file, beautify, explore the tree, and save snippets. Everything stays on-device for speed and privacy.

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.