Convert JSON to Swift Codable structs with advanced configuration options
Try the example below or paste your own JSON. Adjust settings to customize the output.
Customize how your Swift structs are generated
Detects Date, URL, UUID types
Makes structs hashable
Requires 'id' property
Instantly transform any JSON payload into clean, type-safe Swift structs. Paste → Configure → Copy.
Get up and running in three easy steps
Drop your JSON data into the left editor—or load the example to explore.
Switch struct/class, enable Identifiable, and choose your naming convention.
One-click copy pushes clean Swift code to your clipboard—ready for Xcode.
Powerful JSON to Swift features for effortless Codable struct generation.
Choose from Default, camelCase, snake_case, PascalCase, and more.
Toggle between struct or class for your models.
Select let (constant) or var (mutable) declarations.
Automatically detect Date, URL, and UUID types from string patterns.
Make your models Hashable for use in sets or as dictionary keys.
Conform to Identifiable by adding an id property.
A three-pass pipeline ensures precise Swift Codable struct generation from any JSON.
The converter tokenizes your JSON, infers array and object hierarchies, and builds an internal schema graph.
Using regex heuristics and statistical sampling, we detect Date, URL, and UUID patterns, promoting them to native Swift types. Edge cases fall back to String for safety.
Finally, we emit well-formatted Swift with complete CodingKeys, following your struct/class, let/var, and protocol preferences.
Rapid API Integration – Generate models for REST or GraphQL endpoints in seconds.
Prototyping with SwiftUI – Iterate on UI with real-world JSON faster than ever.
Offline Caching – Decode and store remote payloads asCodable structs seamlessly.
Unit Testing – Mock network responses with strongly-typed fixtures.
Quick answers about converting JSON to Swift
Absolutely. The engine walks the entire tree and generates nested Swift structs or classes, preserving relationships.
If a key appears with null—or is missing in sibling objects—the corresponding Swift property is automatically made optional.
Yes. All generated models adopt Codable by default, so you can decode and encode with a single line.
Never. All parsing and Swift synthesis run client-side, so your data stays private.