JSON to Swift Converter
Convert JSON to Swift POJO classes for Swift development
JSON Input
Swift Output
What is JSON to Swift Converter?
Need to generate Swift structs and classes from your JSON (JavaScript Object Notation) data? This tool does that instantly. Perfect for Swift developers working with iOS, macOS, or server-side Swift who need to deserialize JSON into strongly-typed Swift objects. Generate structs, Codable conformance, and type definitions automatically.
According to Swift documentation, Codable protocol makes JSON encoding and decoding seamless. Our converter analyzes your JSON structure and generates proper Swift structs. First, validate your JSON using our JSON Validator, then convert it to Swift. You can also format your JSON with our JSON Formatter first if needed.
Everything happens in your browser – your JSON never leaves your computer. Convert, download, and use your Swift structs right away.
What Makes This Tool Different
Automatic Struct Generation
We analyze your JSON structure and automatically generate Swift structs. JSON objects become structs, arrays become arrays, everything gets proper Swift types.
Codable Support
Generate Swift structs with Codable conformance for seamless JSON encoding and decoding. Works great with Swift's JSONEncoder and JSONDecoder.
Optional Types
Configure optional types for properties that might be null. Perfect for Swift's optional type system and safe JSON decoding.
File Upload Support
Got a big file? Just upload it. Works great for converting those massive JSON configs or data files without copy-pasting.
Download Swift
One click to download your Swift file. Drop it into your Swift project and start using it. Perfect for iOS, macOS, or server-side Swift applications.
Clean Code Output
The generated Swift code is clean and well-formatted. Structs are properly named, properties are typed correctly, and the code follows Swift conventions.
How It Works
Paste or Upload JSON
Paste your JSON into the left editor, or click "Upload" to load a file. The JSON should be valid – use our JSON Validator first if you're not sure. You can also click "Sample" to see an example.
Configure Options
Set your struct name, choose whether to use Codable, and configure optional types. These settings customize the generated Swift code to match your project's conventions.
Download or Copy
Click "Download" to save the Swift file, or "Copy" to copy it to your clipboard. The Swift code is ready to use in your project. Drop it into your Swift project and start using it.
When You'd Actually Use This
iOS Development
Generate Swift structs from JSON API responses for iOS apps. Create models for REST APIs or JSON-based configurations. Perfect for SwiftUI or UIKit applications.
macOS Development
Create Swift structs from JSON data for macOS apps. Generate data models for JSON-based APIs or configurations. Perfect for macOS application development.
Server-Side Swift
Generate Swift structs from JSON data for server-side Swift applications. Create data models for JSON-based APIs or configurations. Perfect for Vapor or Kitura frameworks.
Code Generation
Generate Swift code from JSON data structures. Perfect for creating data models, DTOs, or entity structs from JSON schemas or API responses.
Common Questions
Is my JSON data stored?
Nope. Everything happens right in your browser. Your JSON never leaves your computer – we don't even see it.
How are JSON objects handled?
JSON objects become Swift structs. Properties become struct properties, and nested objects become nested structs or references. Arrays become Swift arrays.
Can I use the generated Swift code?
Yes. The generated Swift code is valid and ready to use. Drop it into your Swift project and start using it. You may want to review and refine the structs for your specific use case.
What about Codable?
You can enable Codable in the configuration options. This generates Swift structs with Codable conformance for seamless JSON encoding and decoding.
Does it work with large JSON files?
Yep. Since everything happens in your browser, it depends on your device. Small to medium JSON structures convert instantly. Really huge structures might take a few seconds.
What Swift version is supported?
The generated code works with Swift 4.0 and later. It uses standard Swift features and Codable protocol for maximum compatibility.
Other JSON Tools You Might Need
Conversion is just one JSON task. Here are other tools that work well together:
Need to learn more about JSON? Check out the official JSON.org website or the comprehensive guide on MDN. For Swift, check out the official Swift documentation.