Istar - JSON & Swagger Studio
Developer Tools
Only for Mac
$2.99
Mac
Istar is the ultimate tool for working with JSON, wherever you are! With its clean, native macOS interface, a multi-document sidebar, and powerful formatting and validation, handling JSON and API specs has never been this easy.
FORMAT & MINIFY
Beautify messy JSON into clean, readable code with one tap — or minify it down to a single compact line. Perfect for API responses, configs, and OpenAPI/Swagger files.
INSTANT VALIDATION
Know immediately if your JSON is valid. Errors are detected on the fly, with the exact line and column highlighted so you can fix them in seconds.
TREE VIEW
Explore complex JSON as an interactive, color-coded tree. Expand or collapse everything at once, search keys and values, and copy any value with a click.
MODEL EXPORT (SWAGGER-STYLE)
Generate ready-to-use data models straight from your JSON — Swift (Codable), Kotlin, and TypeScript — just like editor.swagger.io. Copy or save the generated code and drop it right into your project.
MULTI-DOCUMENT WORKSPACE
Keep all your JSON files in one place. Open many documents at once, switch between them instantly from the sidebar, rename, duplicate, and organize them into groups.
BUILT FOR BIG FILES
A fast native engine handles large JSON and API specs smoothly — thousands of lines, no lag.
SYNTAX HIGHLIGHTING & LINE NUMBERS
Read your JSON comfortably with full syntax coloring, line numbers, and clear error markers.
DRAG & DROP
Just drop one or more JSON files onto the window to start working immediately.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
This update contains bug fixes and improvements.
The developer, Andrea Leto, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Andrea Leto
- Size
- 1.4 MB
- Category
- Developer Tools
- Compatibility
Requires macOS 27.0 or later and a Mac with Apple M1 chip or later.
- Mac
Requires macOS 27.0 or later and a Mac with Apple M1 chip or later.
- Mac
- Languages
English and 3 more
- English, French, Italian, Spanish
- Age Rating
4+
- 4+
- Copyright
- © 2026 DDsoft
