JSON to Swift Struct Generator Online
Generate Swift structs conforming to Codable protocol from JSON. Our free JSON to Swift converter is perfect for iOS developers building type-safe data models quickly.
🍎 For iOS Developers
You're building an iOS app and need to parse JSON from an API. Writing Swift structs with Codable conformance by hand is tedious, especially for nested responses. You want type-safe models that decode JSON correctly.
Generates:
- • Codable structs
- • Proper Swift types
- • Nested type support
- • Optional properties
Use Cases:
- • API response models
- • Local data storage
- • Core Data entities
- • JSON serialization
The Process
Paste JSON
Enter your JSON response or sample data
Name Struct
Set the root struct name (default: Root)
Generate
Get Swift code ready to copy into your project
About JSON to Swift Converter
iOS developers often need to convert JSON responses into Swift structs with Codable conformance. This tool generates Swift struct definitions from your JSON, handling nested objects, arrays, and proper type inference. Save time writing boilerplate model code.
How the conversion works
Paste your JSON in the input panel and set the struct name. Click Convert to Swift and the tool analyzes your JSON structure, infers types, and generates Swift structs with Codable protocol conformance. Nested objects become nested structs.
The output includes proper Swift types: String, Int, Double, Bool, and arrays. Unknown or mixed types use Any. Use Copy to grab the code or Download to save as a .swift file ready for your Xcode project.
When you'd use this
You're building an iOS app that consumes a REST API. Or you received JSON from a backend team and need Swift models to parse it. This tool also helps when prototyping and you want to quickly see what your data models should look like.
The generated structs are a starting point. You may need to add custom coding keys, handle date formatting, or add validation. For complex APIs, consider tools that generate from OpenAPI specs.
Questions
Does this handle nested objects?
Yes, nested JSON objects become nested Swift structs with appropriate names based on their parent key.
What about optional fields?
All fields are generated as non-optional. You may need to make some optional based on your API's actual behavior.
Can I customize the struct name?
Yes, use the Struct Name input to set your preferred name. The default is Root but you can use any valid Swift identifier.
Does it support generics?
No, the generated structs use concrete types. For generic models, you'll need to modify the output manually.
What Swift version is this compatible with?
The generated code works with Swift 4 and later, which introduced the Codable protocol.