QLook JSON

JSON & JSONL Viewer in Finder

Only for Mac

$2.99

Mac

New in 1.3: Pretty Text — escaped \n in long strings becomes real line breaks. Perfect for logs, AI transcripts and API errors. Pay once, no subscription. Press Space on any JSON file and actually read it. QLook JSON adds color-coded, formatted previews to Finder's Quick Look — no app to open, no file to drag anywhere. New: Pretty Text. Long strings full of escaped \n — logs, stack traces, AI agent transcripts, API error messages — turn into real, indented paragraphs. One checkbox turns it on or off, and copied line breaks keep their original \n escapes. Three views, one Space • Pretty — clean indentation that keeps key order and JSONC comments, with collapsible objects and arrays • Raw — the source exactly as written, with syntax highlighting and line numbers • YAML — the same data as readable block-style YAML Supports .json, .jsonc (JSON with comments), and .jsonl / .ndjson (line-delimited JSON). Key features • Instant preview — select a file in Finder and press Space • Pretty Text — escaped line breaks in long strings shown as real line breaks • Made for AI agent logs — prompts, replies and tool output in JSONL become readable, line by line • Folding — collapse nested objects and arrays to scan large files quickly • Dual line numbers — JSONL shows source and formatted line numbers side by side • One-click copy — copy the tab you're viewing, including pretty JSON or converted YAML • Syntax highlighting — keys, strings, numbers, booleans and null stand out • Dark Mode — colors follow your system appearance automatically • Native performance — written in Swift with no web view; smooth scrolling through large files up to 5 MB • Universal — runs natively on Apple Silicon and Intel Macs Privacy Everything happens on your Mac. No network access, no external servers, no embedded web view. QLook JSON runs in the App Sandbox and only reads the file you preview — safe for configs, secrets and tokens. Pay once, use forever. No in-app purchases, no subscriptions, no ads.

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New in 1.3 • Pretty Text — long strings (80+ characters) with escaped \n now show as real, indented line breaks. Turn it on or off with one checkbox; copied line breaks keep their original \n escapes. • The tabs are now Pretty | Raw | YAML. Pretty is the default view, and your last selected tab is remembered. ("Original" is now called "Raw".) • Tabs respond instantly — the half-second delay after clicking is gone. • Fixed: clicking a fold arrow quickly could open the file in another app. • Fixed: Pretty and YAML views could jump back while scrolling.

Version 1.3

The developer, Sang Young Oh, 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.

    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
    Sang Young Oh
    Size
    2.6 MB
    Category
    Productivity
    Compatibility
    Requires macOS 14.0 or later.
    • Mac
      Requires macOS 14.0 or later.
    Languages
    English and 10 more
    • English, French, German, Hindi, Indonesian, Japanese, Korean, Portuguese, Simplified Chinese, Spanish, Traditional Chinese
    Age Rating
    4+
    Copyright
    © 2026 Yuvelliq
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

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