How do I decode this in Swift?

You can decode the generated struct using Swift's built-in JSONDecoder: let model = try JSONDecoder().decode(Root.self, from: data). The embedded CodingKeys handle all property mappings automatically.

JSON to Swift Codable Converter

Convert JSON payloads into native Swift structs with Codable, Hashable, CodingKeys key mapping, optional null safety, and clean camelCase naming.

Target:

Load Template:

JSON Input21 lines · 507 chars

Swift.swift

Generated Swift code will appear here

Paste or type valid JSON on the left to see instant, production-ready models.

Ready to compile · Deterministic output.swift

100% Client-Side Privacy: Your JSON is parsed and compiled entirely in your browser using local Web APIs. Nothing is sent to any server.

Zero Network Transfer

What is the JSON to Swift Codable Converter?

The PriyGop JSON to Swift Converter turns JSON payloads into native Swift structs conforming to Codable. Designed for iOS, iPadOS, macOS, and watchOS developers using SwiftUI or UIKit, it automatically generates CodingKeys enums to bridge snake_case API keys with idiomatic Swift camelCase property names.

Swift Generation Features

Codable & Hashable: Conforms to Codable and Hashable for seamless SwiftUI List and ForEach rendering.
CodingKeys Enum: Automatically maps user_id to case userId = "user_id".
Optional Properties: Nullable and optional values use native Swift optionals (e.g. String?).
Reserved Keyword Protection: Escapes Swift keywords with backticks when necessary.

Our Tool Features

Why developers and engineers prefer this tool for everyday development workflows.

Cross-Device Compatibility

Works seamlessly on all modern desktop, tablet, and mobile browsers including Chrome, Firefox, Safari, Edge on Windows, macOS, Linux, Android, and iOS.

Fast In-Browser Execution

Processes your data in real-time directly inside your browser. No queue wait times, no network round-trips, and zero latency.

100% Client-Side Privacy

Your code, tokens, passwords, and files are never transmitted to any external server or saved in logs. Everything runs locally in memory.

Instant File & Clipboard Input

Supports one-click sample loading, file drag-and-drop, and pasting directly from your clipboard (Ctrl + V) for effortless workflows.

Strict Standards Compliant

Built strictly according to official specifications (RFCs, W3C, ISO, and standard cryptographic algorithms) ensuring accurate output every time.

Unlimited Free Usage

No registration, no accounts, no subscriptions, and no hidden daily quotas. Use this tool as many times as you need without restrictions.

Recent Updates & Improvements

Continuously maintained and improved based on developer feedback.

Client-Side Speed & Performance UpgradeRecent Update

Optimized processing algorithms with Web Workers and native browser APIs (SubtleCrypto, Canvas 2D) for instantaneous zero-latency execution.

Clipboard Paste & Drag-and-Drop AddedFeature Added

Added instant clipboard pasting (Ctrl + V) and drag-and-drop file support to accelerate developer productivity without manual downloads.

Enhanced Mobile & Touch Device ExperienceUI/UX Update

Redesigned responsive touch controls, flexible copy buttons, and camera preview framing for mobile and tablet browsers.

How To Use JSON to Swift Codable Converter Online?

Follow these quick steps to get instant, accurate results in seconds.

Paste JSON Input

Provide the JSON payload from an API or mock response.

Paste any valid JSON string into the editor.
Click 'Sample' to view an example user profile.

JSON PayloadClient-Side

{
  "user_name": "taylor",
  "follower_count": 1420,
  "verified": true
}

Instant ExecutionReady

Inspect Swift Structs

Verify Codable conformance and CodingKeys mapping.

Structs are declared with 'public' access modifiers by default.
CodingKeys enum maps snake_case JSON keys to camelCase Swift properties.

Swift OutputClient-Side

public struct User: Codable {
    public let userName: String
    private enum CodingKeys: String, CodingKey {
        case userName = "user_name"
    }
}

Instant ExecutionReady

Download Swift File (.swift)

Export clean code ready to add to your Xcode project.

Click 'Copy Code' or 'Download' to save the .swift source.

JSONDecoder in SwiftClient-Side

let user = try JSONDecoder().decode(User.self, from: data)

Instant ExecutionReady

Supported Formats & Syntax Examples

Common input data types and real-world representations supported by this tool.

Swift Codable with CodingKeys

Swift

Idiomatic camelCase properties with automatic JSON key mapping.

Example Syntax

import Foundation

public struct User: Codable, Hashable {
    public let id: Int
    public let userName: String
    public let emailAddress: String?

    private enum CodingKeys: String, CodingKey {
        case id
        case userName = "user_name"
        case emailAddress = "email_address"
    }
}

Compiles cleanly in Xcode with swiftc and works seamlessly with JSONDecoder.

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import Foundation public struct User: Codable, Hashable { public let id: Int public let userName: String public let emailAddress: String? private enum CodingKeys: String, CodingKey { case id case userName = "user_name" case emailAddress = "email_address" } }