JSON Master: Editor & Viewer

Name: JSON Master: Editor & Viewer
Rating: 4.6 (5 reviews)
Author: Tianjin Illuso Information Technology Co., Ltd.

JSON to CSV, XML, Excel Tool

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

5 Ratings
Age Rating

4+
Years
Category

Productivity
Developer

Tianjin Illuso Information Technology Co., Ltd.
Language

EN
+ 7 More
Size

42.8
MB

The #1 JSON toolkit. View, edit, format JSON/XML/CSV on the go. High-performance validator & converter. Offline-first, pro-ready. JSON Master is a professional JSON Formatter / Viewer / Converter for developers (offline iOS tool). Three key points upfront: 100% offline processing, privacy-safe, large file support — your data is never uploaded to any server. Core Features (Developer Favorites): JSON Formatter & Beautifier: One-click format/beautify/minify, with syntax highlighting support. JSON Viewer: Tree View / Text views for clear structure visualization. JSON Validator: Instant syntax error detection (with line numbers) for quick API response debugging. Fast Converter: Bidirectional JSON ↔ CSV / XML / Excel (.xlsx) conversion. Large File Support: Smoothly open and edit large files. Import Anywhere: Import from Clipboard / Files for debugging anytime. Why Choose JSON Master? • Privacy First: All formatting, validation, and conversion happen locally on your device. • Focused & Distraction-Free: Clean interface with no redundant steps, perfect for quick data inspection and fixing. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://legal.rkvpxdr.com/privacy.html

Ratings & Reviews

4.6

out of 5

5 Ratings

Finally a clean JSON viewer that works！
Feb 9
Wow 6423
I’ve tried several JSON tools on iOS, but most of them are either cluttered with ads or have a terrible UI. This one is surprisingly clean and intuitive. It makes reading nested structures so much easier on a smaller screen. The tree view is smooth and the overall performance is great even with larger files. Highly recommended for any dev on the go!
Finally a clean JSON viewer that works！
Feb 9
Wow 6423

I’ve tried several JSON tools on iOS, but most of them are either cluttered with ads or have a terrible UI. This one is surprisingly clean and intuitive. It makes reading nested structures so much easier on a smaller screen. The tree view is smooth and the overall performance is great even with larger files. Highly recommended for any dev on the go!
Perfect companion for mobile debugging
Feb 7
Galaxy Remover
As a backend engineer, I often need to quickly check API responses when I'm away from my desk. This app handles complex JSON objects effortlessly. The editor is responsive, and the syntax highlighting is spot on. It has definitely improved my mobile workflow. Simple, fast, and does exactly what it promises. 5 stars!
Perfect companion for mobile debugging
Feb 7
Galaxy Remover

As a backend engineer, I often need to quickly check API responses when I'm away from my desk. This app handles complex JSON objects effortlessly. The editor is responsive, and the syntax highlighting is spot on. It has definitely improved my mobile workflow. Simple, fast, and does exactly what it promises. 5 stars!
Minimalist and Powerful
Feb 10
kychen8888
Love the minimalist design of JSON Master. The ability to switch between tree and code views is seamless. It’s very helpful for verifying data structures quickly. No unnecessary features, just a solid editor that feels native to iOS. If you’re looking for a reliable JSON tool for your iPhone, this is it.
Minimalist and Powerful
Feb 10
kychen8888

Love the minimalist design of JSON Master. The ability to switch between tree and code views is seamless. It’s very helpful for verifying data structures quickly. No unnecessary features, just a solid editor that feels native to iOS. If you’re looking for a reliable JSON tool for your iPhone, this is it.

Better, Faster, Stronger! New Home Interface: Re-designed with you in mind—access your core tools with fewer taps. Powerful Editing: We've fine-tuned the Editor and Calculator logic to handle your tasks more efficiently. Polished Details: Updated UI feedback and toast notifications for a more responsive feel. Reliability Update: Multiple internal enhancements to ensure JSON Master runs smoothly on all devices.

Version 2.0.2 Aug 13

Data Used to Track You

The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Linked to You

The following data may be collected and linked to your identity:
- Identifiers
- Usage Data

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

Accessibility

Information

Seller: Tianjin Illuso Information Technology Co., Ltd.
Size: 42.8 MB
Category: Productivity
Compatibility: Requires iOS 15.0 or later.

iPhone
Requires iOS 15.0 or later.

iPad
Requires iPadOS 15.0 or later.

iPod touch
Requires iOS 15.0 or later.

Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.

Apple Vision
Requires visionOS 1.0 or later.
Languages: English and 7 more

English, French, German, Japanese, Korean, Portuguese, Simplified Chinese, Spanish
Age Rating: 4+

4+

Learn More
In-App Purchases: Yes

JSON Master Pro (Weekly) $2.99

Pro (Yearly) $14.99

Learn More