Comparison

Jayson vs JSON Data Generator

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

Head to head
About

Jayson

This app allows you to view and edit JSON files directly on your device. It offers features like tabbed browsing, split-screen comparisons, and integration with Siri Shortcuts and the Share Sheet for easy JSON parsing and management.

Highlights
  • Browse JSON files
  • Table or syntax highlighted text view
  • Tabbed interface
  • Multiple splits for comparison
  • Siri Shortcuts integration
  • Share Sheet Actions
  • URL schemes
Features
Read full description

Jayson is a JSON viewer and editor for iPhone and iPad. Browse JSON as a structure, edit values, and save your changes back to the file. Whether you're inspecting an API response, checking a config file, or making a quick fix on the go, Jayson turns raw JSON into something you can actually read and change. BROWSE AND EDIT - Open JSON files stored on your device or in iCloud Drive. - Toggle between a structured table view and syntax highlighted text. - Add new values and keys, and save your changes back to the file. - Parse text or the contents of a URL from your clipboard into JSON. - Highlight a key from a child of an array to get a quick overview of your data. TABS, SPLITS, AND WINDOWS - Switch between files, or different objects in a single file, using tabs. - Compare JSON in a single file or across files using multiple splits. - Open multiple windows on the iPad. WORKS WITH SHORTCUTS Jayson integrates with Shortcuts, which comes in handy for debugging API calls, previewing JSON files, and building workflows around JSON. - Pass a response from Get Contents of URL to Jayson to see how it is structured. - Open JSON as a document you keep working on, or as a temporary preview. - Format JSON and hand the result to the next action, using spaces or tabs. FREE, WITH AN OPTIONAL UPGRADE Jayson's core functionality is free. Browsing, editing, saving, splits, Shortcuts, and working with up to two tabs at a time cost nothing. A one-time in-app purchase enables having more than two tabs open at once, switching between light and dark themes, and personalizing the app icon, accent color and type icons. One purchase, no subscription.

About

JSON Data Generator

Features
Read full description

JSON Data Generator is a handy tool for creating realistic JSON objects for testing your applications. You can choose from a variety of field types, such as: - Integer: Generate random integers within a specified range - Double: Generate random decimal numbers within a specified range - Month name: Generate random month names in long or short format - Weekday name: Generate random weekday names in long or short format - Bool: Generate random boolean values (true or false) - GUID: Generate random globally unique identifiers (GUIDs) - Date range: Generate random dates within a specified range, in short or Posix format - First and Last names: Generate random names from a list of common first and last names - Email: Generate random email addresses from a list of common domains - Color: Generate random color names from a list of common colors - Lorem Ipsum text: Generate random text from the classic Lorem Ipsum filler text You can customize the number of objects, the number of fields per object, and the field names. You can also save your settings and load them later. The generated JSON objects can be copied to the clipboard or exported to a file. JSON Data Generator is a simple and useful tool for developers who need to generate mock data for testing their applications.

Screenshots

Jayson4 screens

Verdict

The call

The clearest difference is price: Jayson at Free against JSON Data Generator's $0.99. Jayson also leads on update cadence (every 3 weeks vs every 37 months) and chart position (#87 vs unranked). JSON Data Generator's advantage is in-app purchases (none vs 1) and iOS requirement (15.6 vs 26.0). On 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

Jayson is free to download; JSON Data Generator costs $0.99 up front. Jayson sells 1 one-off in-app purchase. JSON Data Generator asks for nothing beyond the download.

UpkeepUpdate frequency

Jayson ships an update every 3 weeks, JSON Data Generator every 37 months. The most recent releases landed on October 13, 2026 and October 5, 2026 respectively.

Scorecard5 real differences · 6 level
Jayson versus JSON Data Generator: the parameters behind the verdict, then further details
ParameterJaysonJSON Data Generator
PriceFree — better$0.99
Rating4.5 (425 ratings) — better—
Positive reviews80.7% of reviews—
Number of ratings425 — better—
Update frequencyEvery 3 weeks — betterEvery 37 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
Best chart rank#87 — better—
DevicesiPhone, iPadiPad, Mac
Requires iOS26.015.6 — better
Further details — not scored
Size41 MB1 MB
Age rating4+4+
DeveloperSimon B. StøvringKonstantin Adamov

Bugs and requests

Jayson

Reported bugs

6 issues
  • App crashes when opening large JSON files (89MB+)
  • Crashes on regular use despite functionality
  • Device freezing for extended periods
  • Safari compatibility broken in recent updates
  • Navigation back through JSON structure is unreliable
Show 1 more
  • Accidental file exit when attempting to navigate

Requested features

9 requests
  • Search/find functionality within files
  • JSON editing and modification capabilities
  • XML format support
  • Split-view for comparing different arrays
  • Export functionality for edited JSON
Show 4 more
  • Comment recognition in JSON files
  • Plain text editor option
  • Improved file size handling for large documents
  • Better navigation controls on mobile devices

JSON Data Generator

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Jayson

One-time1
  • Unlock Everything$4.99
None

JSON Data Generator

No in-app purchases

Questions

Is Jayson free?
Jayson is free to download, with in-app purchases available.
Is JSON Data Generator free?
JSON Data Generator costs $0.99, with no in-app purchases.
Do Jayson or JSON Data Generator have ads?
Neither Jayson nor JSON Data Generator shows ads.
Which is updated more often, Jayson or JSON Data Generator?
Jayson ships an update every 3 weeks, and JSON Data Generator every 37 months. Most recently, Jayson was updated on October 13, 2026 and JSON Data Generator on October 5, 2026.

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