Convert
JSON to Swift
Generate Swift Codable structs from JSON. Nested types inferred automatically — paste into Xcode and go.
import Foundation
struct Profile: Codable {
let email: String
let verified: Bool
}
struct Root: Codable {
let id: Int
let name: String
let roles: [String]
let profile: Profile
}Why use our JSON to Swift?
100% private
Everything runs in your browser. Your data never leaves your device — safe for production payloads.
Instant results
No round trips, no rate limits, no login. Format, validate and inspect megabytes of JSON in milliseconds.
Standards-first
Follows RFC 8259 / ECMA-404 exactly. Reports errors with precise line and column diagnostics.
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OpenRelated reading
Deep-dive guides that pair well with the JSON to Swift.
Guides
What is JSON? A developer's introduction
Understand the JSON data format, its history, and why it dominates modern APIs and configuration files.
ReadComparisons
JSON vs XML: which should you use?
Compare readability, verbosity, tooling, schema support and performance between JSON and XML in modern systems.
ReadDeveloper Tips
10 common JSON errors and how to fix them
Every JSON syntax error you'll ever see — trailing commas, unquoted keys, bad escapes — with a working repair strategy.
Read