JSONaire - Large JSON Viewer

Fast JSON viewer for big files

Only for Mac

Free · In‑App Purchases

Mac

A native, fast JSON viewer for macOS. Opens gigabyte JSON files other viewers choke on, browses arrays as tables, exports to CSV, jumps to any path. JSONaire is a JSON viewer for macOS that opens the files other viewers can't. Drop in a document that makes your current tool freeze, beachball, or give up. JSONaire parses around 430 MB of JSON per second, so a hundred-megabyte API dump is on screen in well under a second, and multi-gigabyte documents take seconds rather than minutes. Then scroll it, search it, expand it, and copy pieces out of it — at that same speed, all the way through. BUILT FOR SIZE • Files are memory-mapped rather than read into memory, so opening one costs almost nothing up front • Parses about 430 MB of JSON per second cold, and around 750 MB/s once the file is cached, on an M-series Mac • Documents with millions of values stay fully interactive, not merely openable • Opens documents up to 4 GB • Scrolling stays smooth no matter how deep or wide the tree gets FIND ANYTHING, FAST • Search scans raw bytes in a single linear pass — there is no index to build, so the first match arrives immediately • Jump between matches with Cmd-G and Shift-Cmd-G • Expand All and Collapse All work across the entire document, with no cap on how much they will unfold BROWSE ARRAYS AS A TABLE • Right-click any array of objects to open it as a spreadsheet-style table • Sort by any column • Stack filter rules to cut thousands of records down to the ones you care about • Export exactly what is on screen to CSV — filtered and sorted, ready for Numbers or Excel COPY WHAT YOU NEED Right-click any row, or use the Edit menu, to copy: • The key, the value, or the full path to it • A whole subtree — formatted, minified, or byte-for-byte as it appears in the file Copying a large array is instant. JSONaire takes a slice of your original text instead of re-serialising it, so Copy Value on a 500 MB array is a substring rather than a rebuild. A REAL MAC APP • Native macOS tabs — drag a tab out into its own window, merge windows back together, use the tab overview, all with the system's own behaviour • Every tab keeps its own document, expansion state, selection, and search • Full keyboard control with standard shortcuts • Drag files onto the window, open them from Finder, or open JSON straight from the clipboard with Shift-Cmd-V • Light, Dark, or follow the system • Recent files, always up to date STAYS ON YOUR MAC Your JSON is read entirely on-device. Nothing is uploaded, there is no account to create, and the app collects no analytics of any kind — which matters when the payload you are debugging belongs to a customer. SUPPORTED FORMATS .json and .geojson FREE AND PRO JSONaire is free, and opens documents up to 100 MB with the Classic and Graphite themes. JSONaire Pro lifts that limit to the full 4 GB and unlocks all eight themes — Classic, Graphite, Midnight, Solarized, Nord, Ember, Forest, and Grape. It is a one-time purchase, not a subscription. Buy it once and it is yours. Requires macOS 14 or later. JSONaire is a viewer, not an editor. It opens and inspects JSON; it never modifies your files.

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New Features: - Save as CSV: export an array of objects to a CSV file. - Go to path: jump straight to any node by entering its JSON path.

Version 1.2.0

The developer, Riva Farabi, 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 Linked to You

    The following data may be collected but it is not linked to your identity:

    • Purchases

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Riva Farabi
Size
  • 6.3 MB
Category
  • Developer Tools
Compatibility
Requires macOS 14.0 or later.
  • Mac
    Requires macOS 14.0 or later.
Languages
  • English
Age Rating
4+
In-App Purchases
Yes
Copyright
  • © 2026 Riva Farabi
  • Privacy Policy

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