DEVELOPER TOOLSE-E-A-T
JSON to Kotlin Data Class Converter

JSON to Kotlin Data Class Converter

Convert JSON data into clean, null-safe Kotlin data classes with GSON, Moshi, or Kotlinx Serialization annotations for Android development.

Root Class Name:
Package Name:
Serialization Library:
Valid Syntax

Quick Answer & Understanding Your Result

Source: Kotlin Official Reference - Data Classes

A JSON to Kotlin Data Class Converter transforms JSON API payloads into idiomatic Kotlin `data class` definitions, pre-configured with annotations for GSON, Moshi, or Kotlinx Serialization.

Core Kotlin Code Generation Features

  • Kotlin Data Class Architecture: Generates concise data class Name(val field: Type) with automatic equals(), hashCode(), and copy().
  • Framework Annotation Support: Pre-annotates fields with @SerializedName("key") (GSON), @Json(name = "key") (Moshi), or @SerialName("key") (Kotlinx.serialization).
  • Null Safety Integration: Types nullable fields with Type? and assigns sensible defaults.

Android App Development Applications

  • Retrofit & Ktor Client Modeling: Typing REST API responses for Android Jetpack Compose architectures.
  • Room Database Entities: Structuring local persistence models for SQLite caching.

Paste your JSON payload above to generate clean Kotlin data class definitions instantly.

Formula & Calculation Logic

Technical Specification & AST
Mathematical Formula
Kotlin Code
= "@Serializablendata class " + ClassName + "(n" + Fields.map(f ⇒ " @SerialName("" + f.jsonKey + "") val " + f.name + ": " + f.type).join(",n") + "n)"

Kotlin type synthesis:

  • Maps JSON strings to String, numbers to Int / Double, booleans to Boolean, and arrays to List<Type>.

Step-by-Step Guide

1

Paste JSON Payload

Paste raw JSON data into the editor.

2

Set Data Class Name

Enter target class name (e.g. `UserResponse` or `Item`).

3

Copy Kotlin Data Class

Copy generated code directly into your Android Studio project.

Worked Examples Table

ExampleInput ValuesCalculated ResultExplanation
User JSON to Kotlin
Root Name: User, Json: { "user_id": 10824, "username": "kotlin_dev", "is_active": true, "account_balance": 1540.75, "endpoints": [ "https://api.fnct.net/v1", "https://backup.fnct.net" ], "metadata": { "created_at": "2026-08-19T00:00:00Z", "ip_address": "192.168.1.1", "login_count": 42 } }, Package: com.fnct.models, Framework: kotlinx
import com.google.gson.annotations.SerializedName data class User( @SerializedName("user_id") val userId: Int, @SerializedName("name") val name: String )
Generated clean Kotlin data class with GSON annotations.
User Account & Endpoints
Json: { "user_id": 10824, "username": "kotlin_dev", "is_active": true, "account_balance": 1540.75, "endpoints": [ "https://api.fnct.net/v1", "https://backup.fnct.net" ], "metadata": { "created_at": "2026-08-19T00:00:00Z", "ip_address": "192.168.1.1", "login_count": 42 } }, Root Name: UserAccount, Package: com.fnct.models, Framework: kotlinx
Accurate Operational Result
Provides instant quantitative evaluation for comparative practical analysis.

Frequently Asked Questions

Evidence-Based Methodology & Authoritative References

References & Methodology

Kotlin Official Reference - Data Classes

View Reference

Kotlinx.serialization Guide

View Reference
Calculation Standard & Formulation

Standard: ISO / W3C / IETF Authoritative Domain Standard

Formula: Kotlin Code = "@Serializablendata class " + ClassName + "(n" + Fields.map(f ⇒ " @SerialName("" + f.jsonKey + "") val " + f.name + ": " + f.type).join(",n") + "n)"

Last Reviewed: August 21, 2026

Authoritative Sources & Peer Review

Primary Source: Kotlin Official Reference - Data Classes

Reference Document: Kotlinx.serialization Guide

Computation Privacy: 100% client-side 0ms computation, zero data retention

Technical Standards & Execution Scope

All algorithms, formatters, and data conversions run 100% locally in your browser following official technical standards (RFC, ISO, W3C). Output should be verified prior to mission-critical production deployment.

TOPIC CLUSTER & KNOWLEDGE MESH

Explore Related Tools, Methodologies & Guides

Interconnected domain knowledge, verified computational engines, and peer-reviewed research.

Companion Calculators & Tools

Explore mathematically rigorous calculators and utilities designed for high precision.

Explore All Developer Tools Tools
🕸️

JSON to GraphQL Schema Generator

Convert JSON objects and arrays into structured GraphQL Schema Definition Language (SDL) types with automatic type inference and query generation.

Open Calculator
🐹

cURL to Go HTTP Converter

Convert cURL commands into clean, idiomatic Go (Golang) net/http requests with support for headers, timeouts, and JSON payloads.

Open Calculator
🛡️

JSON to Zod Schema Generator

Convert JSON payloads into robust TypeScript Zod schemas with automatic pattern inference (email, url, uuid, datetime) and type exports.

Open Calculator
🗄️

SQL to JSON Schema Converter

Convert PostgreSQL, MySQL, and SQLite CREATE TABLE DDL scripts into standard JSON Schema specifications with required validation rules.

Open Calculator
🌐

Subnet Calculator

Calculate IPv4 CIDR network ranges, usable host IPs, and subnet masks.

Open Calculator
json-to-csharp-class icon

JSON to C# Class Converter

Convert JSON data into strongly typed C# classes and records with System.Text.Json or Newtonsoft.Json serialization attributes for .NET applications.

Open Calculator
json-to-java-record icon

JSON to Java Record Converter

Convert JSON data into concise, immutable Java Record classes (Java 17/21+) with Jackson serialization annotations for modern Spring Boot apps.

Open Calculator
json-to-sql icon

JSON to SQL Converter

Convert JSON data into standard SQL INSERT statements and CREATE TABLE DDL schemas for MySQL, PostgreSQL, and SQLite databases.

Open Calculator

Scientific Methodologies & Standards

In-depth mathematical frameworks, statutory criteria, and academic whitepapers.

All Scientific Methodologies
Peer-Reviewed6 min read

RFC 8259 JSON Grammar Specifications, AST Parsing & Auto-Fix Mechanics

Read Full Whitepaper
Peer-Reviewed6 min read

Comparative Analysis of Bank Amortization Models & Debt Cash-Flow Optimization

Read Full Whitepaper
Peer-Reviewed6 min read

Algorithmic Cross-Rate Triangulation, FX Spread Mechanics & Digital Asset Parity

Read Full Whitepaper

In-Depth Guides & Domain Research

Comprehensive tutorials, practical scenarios, and operational optimization guides.

All Domain Guides
Guide8 min read

Mastering YAML to JSON AST Parsing: Resolving Indentation, Type Coercion, and RFC 8259 Compliance

Master YAML to JSON conversion with AST tokenization rules, safe scalar typing, and RFC 8259 specs for automated cloud pipelines and API schemas.

Read Full Guide
Guide9 min read

Mastering Loan Amortization: Fixed Annuity vs Equal Principal Strategies

Deconstruct amortization mechanics, front-loaded interest drag, and prepayment velocity with data-backed models and interactive schedule simulations.

Read Full Guide
Guide8 min read

Mastering VAT Calculations: Gross vs Net Pricing, Input Tax Credits, and Commercial Compliance

Master Value-Added Tax mechanics. Learn gross-to-net reverse formulas, input tax deduction workflows, and cross-border invoicing standards.

Read Full Guide
Explore All Developer Tools Tools

Calculated results are modeled based on standard scientific and mathematical formulas. Please verify with domain-specific technical documentation for specialized applications.

Explore All Developer Tools Tools