KULDIG Preview vs JSON Tools
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KULDIG Preview
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Mit der KULDIG Preview-App stellen wir Ihnen den KULDIG AppCreator vor. Zur Nutzung der App benötigen Sie einen Kundenzugang zum KULDIG AppCreator. Diesen können Sie jederzeit auf www.kuldig.de erstellen. Wir wünsche Ihnen viel Spaß bei der Verwendung. Sollten Sie Fragen oder Probleme haben, dann stehen wir Ihnen jederzeit unter info@kuldig.de oder via unserer Website www.kuldig.de zur Verfügung.
JSON Tools
This app provides a comprehensive suite of tools for developers to efficiently manage and edit JSON data. It offers features like syntax highlighting, instant validation, and data comparison, along with the ability to generate code models and mock data.
- Explore JSON in tree or raw view
- Edit with syntax highlighting and undo/redo
- Instant JSON validation
- Compare JSON documents
- Generate Dart model classes
- Create mock data
- Visualize structure with Graph View
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JSON Tools is a fast, modern JSON workbench built for developers who live inside APIs. WHAT YOU CAN DO • Explore large JSON files in tree or raw view with collapsible nodes • Edit with line-numbered syntax highlighting, Undo/Redo, and smart indent • Catch errors as you type with instant JSON validation and clear messages • Compare two JSON documents line by line with the diff engine • Generate strongly-typed Dart model classes in one tap • Spin up realistic mock data for unit tests in seconds • Visualize structure as a connected graph with Graph View BUILT FOR Flutter / Dart developers, backend engineers, QA engineers, and anyone who wrestles with JSON every day. EXPERIENCE Personalized Light and Dark themes, smooth animations, and an ad-free Premium option for focused work. Take control of your JSON—download JSON Tools now.
Screenshots
Verdict
The clearest difference is in-app purchases: KULDIG Preview at none against JSON Tools's 1. KULDIG Preview also leads on ads (none vs shown). JSON Tools's advantage is update cadence (fortnightly vs every 2 months). On price, device support 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
Both are free to download. JSON Tools sells 1 one-off in-app purchase. KULDIG Preview asks for nothing beyond the download.
KULDIG Preview ships an update every 2 months, JSON Tools fortnightly. The most recent releases landed on November 7, 2026 and November 14, 2026 respectively.
| Parameter | KULDIG Preview | JSON Tools |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.0 (2 ratings) — better |
| Positive reviews | — | 33.3% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 51 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | KULDIG | OKAN KAYCI |
In-app purchases
KULDIG Preview
No in-app purchases
JSON Tools
- JSON Tools Premium$4.99
Questions
Is KULDIG Preview free?
Is JSON Tools free?
Do KULDIG Preview or JSON Tools have ads?
Which is updated more often, KULDIG Preview or JSON Tools?
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