JSON To Class Converter

JSON to Java, Kotlin, and TypeScript converter for API payloads

Paste an API response and review Java DTOs, Kotlin data classes, TypeScript interfaces, and Markdown docs in one workspace. The interactive converter loads on this page, while the static HTML already exposes enough content for crawlers to understand the tool.

Tool

JSON Payload

The interactive converter hydrates here in the browser. Search engines still receive the example payload and explanatory copy below.

{
  "orderId": "ORD-2026-001",
  "status": "PAID",
  "amount": 12900,
  "customer": {
    "name": "Lee",
    "email": "lee@example.com"
  }
}

Output

Generated Java Example

public class OrderResponse {
  private final String orderId;
  private final String status;
  private final Integer amount;
  private final Customer customer;
}

Explanation

Why teams still convert JSON into typed models

Typed models make API contracts visible to the compiler, reviewers, and tests. Instead of letting field names drift across `any`, `Map`, or loose JSON nodes, the converter gives teams a fast starting point for DTOs and interfaces that can later be refined for dates, enums, validation, and naming rules.

Supported Languages

Converter pages with language-specific guidance

JSON to Java

Generate Java DTOs and review validation-oriented API models.

JSON to Kotlin

Review nullability and Kotlin data class structure quickly.

JSON Formatter

Format sample payloads before sending them back into the converter.

Limitations

Large payloads and custom domain rules still need review

Large payloads can still stress browser memory, and generated code is only a draft. Review nullability, date types, money fields, and naming conventions against real API behavior before committing generated models.

All Tools

Every JSON2Class tool and guide

All converters, developer utilities, and guides available on this site.

JSON to code converters

Developer utilities

Guides

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