JSON to Swift Codable Struct Converter
Instantly convert JSON objects into clean Swift Codable structs with automatic CodingKeys enum generation, backtick keyword protection, and SwiftUI support.
At a glance
JSON to Swift Converter is a free web tool that converts JSON to Swift Codable structs online. It generates clean Swift structs conforming to Codable, Decodable, or Identifiable for SwiftUI. It also automatically maps snake_case JSON keys to camelCase Swift properties with nested CodingKeys enums. All processing is local: nothing is uploaded, and no account is required.
100% Client-Side In-Browser JSON to Swift Converter
Generate production-ready Swift Codable structs with automatic CodingKeys, backtick keyword escaping, and SwiftUI compatibility. 100% private in browser memory.
// Paste JSON on the left to generate Swift Codable structs...// Decode JSON Data with modern Swift async/await
func fetchModel(from url: URL) async throws -> Root {
let (data, _) = try await URLSession.shared.data(from: url)
let decoder = JSONDecoder()
decoder.dateDecodingStrategy = .iso8601
return try decoder.decode(Root.self, from: data)
}
Clean value types conforming to Codable or Identifiable for seamless SwiftUI Lists and SwiftData binding.
Maps JSON snake_case keys to idiomatic Swift camelCase properties with custom enum definitions.
Execution happens entirely in local browser memory with zero network transmissions or cloud logging.
Why Use This JSON to Swift Converter?
How to Use JSON to Swift Converter
Paste Your JSON
Paste your JSON payload into the input editor or pick one of the preset samples.
Configure Swift Options
Select protocol conformance (Codable, Decodable, Identifiable), let/var modifiers, and CodingKeys mode.
Copy or Download Swift Code
Click 'Copy' to copy the generated Swift code or download it as a .swift file.
Worked example: JSON to Swift Converter
Executed entirely inside your local browser memory using modern Web APIs. The engine verifies input syntax, performs deterministic transformation, and exposes instant copy or download options.
sample_payload.json (Valid format conforming to JSON specification)
converted_result.swift (100% client-side)
Technical Specifications & Engine Details
| Specification | Details |
|---|---|
| Supported Formats | JSON, TEXT → SWIFT, TEXT |
| Execution Mode | 100% Client-Side In-Browser (client) |
| Browser Requirements | Requires modern web browser with ECMAScript 6+ and standard DOM Web APIs. |
| Performance Constraints | Client browser memory limit (typically 1–2 GB RAM); processing speed depends on local device CPU. |
100% Client-Side Privacy Guarantee
All JSON parsing and Swift code generation execute 100% locally in your browser memory. Your data never leaves your device.
Frequently Asked Questions
How does this tool convert JSON to Swift structs?
Does it automatically generate CodingKeys?
Can I use the output directly in SwiftUI apps?
How does it handle reserved Swift keywords in JSON fields?
Methodology
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Last updated .