# JSON Prettify vs Advanced JSON Viewer

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.

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.

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.

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.

## The numbers

| Metric | JSON Prettify | Advanced JSON Viewer |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/json-prettify/id6737413797/reviews)** | [3.3 (3 ratings)](https://appshunter.io/ios/app/advanced-json-viewer/id6739271287/reviews) |
| Number of ratings | 2 | **3** |
| Positive reviews | **100.0% of reviews** | 40.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Every 6 weeks |
| Monetization | **Ad-supported** | Paid |
| Best chart rank | — | **#186** |
| Size | 6 MB | 5 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | +4 | 4+ |
| Developer | [Jean-Philippe DESCAMPS](https://appshunter.io/developer/334555645) | [Acrogenesis LLC](https://appshunter.io/developer/1784592807) |

## What reviewers say

### JSON Prettify

[App page](https://appshunter.io/ios/app/json-prettify/id6737413797)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Advanced JSON Viewer

[App page](https://appshunter.io/ios/app/advanced-json-viewer/id6739271287)

**Currently charting:** #186 Top Paid · Developer Tools (US App Store)

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:** Safari Extension, Vision Pro support

**In-app purchases:** none


## Frequently asked 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.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*