Comparison

JSON Prettify vs Advanced JSON Viewer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

JSON Prettify

Easily format and validate JSON data with a clean, intuitive interface. Get clear error messages for invalid JSON and switch to a compact view for efficient data exploration. Streamline your JSON workflow with this developer-friendly tool.

Highlights
  • Quick and clear JSON formatting
  • Detailed error messages for invalid JSON
  • Compact mode for compressed view
  • User-friendly interface
  • JSON validation
Features
Read full description

JSON Prettify is designed to make working with JSON data easier and more efficient. Whether you’re a developer debugging API responses or a data enthusiast exploring structured information, JSON Prettify provides a clean, intuitive experience for both formatting and validating JSON. • Quick and Clear Formatting: Instantly transform unreadable JSON into a clean, well-organized structure. • Detailed Error Messages: When JSON isn’t valid, JSON Prettify provides precise error messages to help you find exactly what’s wrong. • Compact Mode: Switch to a compressed view to minimize the JSON structure without losing essential information. • User-Friendly Interface: Enjoy a seamless experience designed with developers in mind. JSON Prettify is your lightweight, powerful tool for error-free, organized JSON. Get started today and streamline your JSON workflow!

About

Advanced JSON Viewer

This tool enhances JSON data viewing and editing within Safari and on your device. It offers beautiful formatting, syntax highlighting, and an interactive editor for efficient JSON management.

Highlights
  • Open and save JSON files
  • Beautiful JSON formatting
  • Syntax highlighting
  • Interactive editor
  • Light & dark modes
  • Error detection
Features
Read full description

Advanced JSON Viewer transforms raw JSON data into an elegant, interactive viewing experience right in Safari and now supports opening and saving JSON files directly from your device. Key Features: • Open JSON Files: Open and view JSON files from your device with powerful formatting • Save JSON Files: Edit and save your JSON data directly to your device • Beautiful JSON Formatting: Instantly transforms unformatted JSON into a clean, readable format • Syntax Highlighting: Makes JSON structure easily readable with color-coded elements • Light & Dark Modes: Automatically switches between themes based on your system preferences • Customizable Themes: Choose from a wide selection of professional color schemes • Interactive Editor: Edit JSON directly in the browser with the powerful Ace editor • Settings Toolbar: Quick access to all viewing preferences in one convenient panel • Adjustable Settings: Customize font size, tab width, and other viewing preferences • Invisible Characters: Option to display invisible characters for precise editing • Fast & Efficient: Works instantly on any JSON page or file without slowing down your experience • Error Detection: Highlights JSON syntax errors as you type • Toggle Views: Switch between raw and formatted views with a single click Perfect for developers, QA engineers, API testers, and anyone who works with JSON data. Advanced JSON Viewer makes reading, editing, and saving JSON in Safari and local files a delightful experience. Built with attention to detail and performance, this app seamlessly enhances your JSON workflow whether you're browsing API responses online or examining and editing local configuration files. Available as a universal purchase - buy once and use it on Mac, iPhone, iPad, and Vision Pro.

Screenshots

JSON Prettify3 screens
Advanced JSON Viewer4 screens

Verdict

The call

The clearest difference is review sentiment: JSON Prettify at 100% against Advanced JSON Viewer's 40%. JSON Prettify also leads on price (Free vs $1.99) and rating (5.0 vs 3.3). Advanced JSON Viewer's advantage is ads (none vs shown) and chart position (#186 vs unranked). On ratings volume, in-app purchases and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

JSON Prettify is free to download; Advanced JSON Viewer costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

JSON Prettify holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 2 and 3 respectively. Written reviews point the same way: 100% of JSON Prettify's written reviews are positive against 40% of Advanced JSON Viewer's.

UpkeepUpdate frequency

JSON Prettify ships an update every 5 days, Advanced JSON Viewer every 6 weeks. The most recent releases landed on September 10, 2026 and September 24, 2026 respectively.

Scorecard8 real differences · 3 level
JSON Prettify versus Advanced JSON Viewer: the parameters behind the verdict, then further details
ParameterJSON PrettifyAdvanced JSON Viewer
PriceFree — better$1.99
Rating5.0 (2 ratings) — better3.3 (3 ratings)
Positive reviews100.0% of reviews — better40.0% of reviews
Number of ratings23 — better
Update frequencyEvery 5 days — betterEvery 6 weeks
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported — betterPaid
Best chart rank—#186 — better
DevicesiPhone, iPadiPhone, iPad, iPod, Mac — better
Requires iOS16.615.0 — better
Further details — not scored
Size6 MB5 MB
Age rating+44+
DeveloperJean-Philippe DESCAMPSAcrogenesis LLC

Customer experience

JSON Prettify

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Advanced JSON Viewer

All ratings3 ratings
Positive33.3%
Neutral33.3%
Negative33.3%
Written reviews5 reviews
Positive40.0%
Neutral20.0%
Negative40.0%

In-app purchases

None

JSON Prettify

No in-app purchases

None

Advanced JSON Viewer

No in-app purchases

Questions

Is JSON Prettify free?
JSON Prettify is free to download, with no in-app purchases.
Is Advanced JSON Viewer free?
Advanced JSON Viewer costs $1.99, with no in-app purchases.
Which has better reviews, JSON Prettify or Advanced JSON Viewer?
JSON Prettify is rated higher. JSON Prettify averages 5.0 out of 5 from 2 ratings, while Advanced JSON Viewer averages 3.3 from 3 ratings.
Do JSON Prettify or Advanced JSON Viewer have ads?
JSON Prettify shows ads; Advanced JSON Viewer does not.
Which is updated more often, JSON Prettify or Advanced JSON Viewer?
JSON Prettify ships an update every 5 days, and Advanced JSON Viewer every 6 weeks. Most recently, JSON Prettify was updated on September 10, 2026 and Advanced JSON Viewer on September 24, 2026.

Other comparisons