Comparison

JSON Designer vs API Debugger

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

Head to head
About

JSON Designer

Visually model and design JSON structures with this intuitive tool. Generate code from your models and export diagrams for documentation. Ideal for developers who want to understand and represent APIs more effectively.

Highlights
  • Graphically model JSON structures
  • Export JSON models as images
  • Reverse-generate models from JSON
  • Browse API examples
  • Generate Protocol Buffers (.proto)
  • Includes tutorial and open-in functionality
Features
Read full description

Start modeling - finally! your JSON visualization & design tool If you are new to the app: this app is out for a couple of years now and develpers greatly appreciate it. It is a design tool primarily, and has always been for free as my part of giving back to the developer community. I put some effort in a smoother design and made many adjustments from some valuable feedbacks. Code generators are a separate feature, which is connected to a payment, which is a practical way to show if you value the feature and the app itself. Depending on your feedback the app will be extended with further functionality. Enjoy JSON modeling! tl;dr: Modeling is the core feature and for free as always, code generators have to be paid for (and save lots of time) Despite the long existence of UML and best practices of software engineering you can't find any diagrams in the API documentations of Google, Facebook, Twitter and the likes. So help yourself, stop deciphering unreadable example files and use this new simplified visual representation of JSON structures as object oriented models. Methodology: • Tree structures depict hierarchical structures of objects • Multiplicity indicator of objects and attributes depict arrays Examples and a tutorial are provided inside the App. Use JSON Designer to jump right into defining your API, without reading a single page of JSON documentation. Features: • Graphically model JMs, ie your JSON Models • Export JM images to integrate in documentations • Reverse-generate JMs from URLs or direct JSON input • Browse hand-picked API examples • NEW Generate Protocol Buffers .proto for gRPC • Tutorial • Open-in: exchange JSON files with other apps Stay tuned for new features via @jsondesigner on Twitter. Feedback is gratefully appreciated. More that 65% of JSON Designer users say it's a must-have and are using it daily! Optional code generators for backers (saving you lots of time): Obj-C, Swift, Java, Kotlin, JavaScript, Perl, Python, Ruby, PHP. To back the app, show your gratitude and support further development, simply get the "I'm backing you" app subscription for a couple of month: This subscription brings you access to an extended and growing selection of code generators. It's a recurring monthly subscription, bringing you full access to all code generators for that time. The subscription is allocated as monthly 1.99$ payment. The subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Your account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. The subscription may be managed and auto-renewal may be turned off by going to your Account Settings after purchase. No cancellation of the current subscription is allowed during active subscription period. Any unused portion of a free trial period, if offered, will be forfeited when you purchase the subscription. In regards of subscriptions please review the terms of use and privacy policy on jsondesigner.com/privacyterms

About

API Debugger

This tool helps developers inspect and understand API response data. It provides a clear interface for debugging and analyzing the information received from APIs, aiding in the development process.

Highlights
  • Debug API response data
  • Analyze data
  • Clear interface
  • Aid development process
Features
Read full description

Debug API Response Data.

Screenshots

JSON Designer2 screens
API Debugger4 screens

Verdict

The call

The clearest difference is review sentiment: JSON Designer at 52% against API Debugger's 0%. JSON Designer also leads on rating (3.3 vs 3.0) and ratings volume (10 vs 1). API Debugger's advantage is in-app purchases (none vs 1). On price, update cadence, ads and device support 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

Both are free to download. JSON Designer sells 1 in-app purchase, starting at $1.99 per month. API Debugger asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

JSON Designer holds the better App Store score, 3.3 against 3.0. That said, the two scores are not equally well evidenced: JSON Designer has 10 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 52% of JSON Designer's written reviews are positive against 0% of API Debugger's.

UpkeepUpdate frequency

JSON Designer ships an update every 4 months, API Debugger every 3 months. The most recent releases landed on June 10, 2026 and July 7, 2026 respectively.

Scorecard6 real differences · 4 level
JSON Designer versus API Debugger: the parameters behind the verdict, then further details
ParameterJSON DesignerAPI Debugger
PriceFreeFree
Rating3.3 (10 ratings) — better3.0 (1 ratings)
Positive reviews52.0% of reviews — better0.0% of reviews
Number of ratings10 — better1
Update frequencyEvery 4 monthsEvery 3 months — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better15.0
Further details — not scored
Size10 MB1 MB
Age rating4+12+
DeveloperCribster UG (haftungsbeschrankt)Guilin Cui

Customer experience

JSON Designer

All ratings10 ratings
Positive40.0%
Neutral30.0%
Negative30.0%
Written reviews50 reviews
Positive52.0%
Neutral10.0%
Negative38.0%

API Debugger

All ratings1 ratings
Positive0.0%
Neutral100.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

In-app purchases

1 purchases

JSON Designer

Subscriptions1
  • App Backer - Code Generators Access$1.991 Month
None

API Debugger

No in-app purchases

Questions

Is JSON Designer free?
JSON Designer is free to download, with in-app purchases available.
Is API Debugger free?
API Debugger is free to download, with no in-app purchases.
Which has better reviews, JSON Designer or API Debugger?
JSON Designer is rated higher. JSON Designer averages 3.3 out of 5 from 10 ratings, while API Debugger averages 3.0 from 1 ratings.
Do JSON Designer or API Debugger have ads?
Neither JSON Designer nor API Debugger shows ads.
Which is updated more often, JSON Designer or API Debugger?
JSON Designer ships an update every 4 months, and API Debugger every 3 months. Most recently, JSON Designer was updated on June 10, 2026 and API Debugger on July 7, 2026.

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