JSON to Dart

JSON to C#

Generate C# classes with auto-properties from JSON. Nullable reference types for missing values. Newtonsoft-ready.

JSON to Java

Generate Java POJO classes from JSON. Boxed types for optional fields — safe for Jackson / Gson serialization.

JSON to Kotlin

Generate Kotlin data classes from JSON. Nullable types inferred, ready for kotlinx.serialization or Moshi.

JSON to CSV Converter

Convert JSON arrays to CSV rows with automatic header detection and configurable delimiters.

JSON to Go

Generate Go structs with JSON tags from any JSON sample. Handles nested objects, arrays and slices automatically.

JSON to Python

Generate Python dataclasses from JSON. Emits Optional[] for nullable fields and type-safe field annotations.

Guides

What is JSON? A developer's introduction

Understand the JSON data format, its history, and why it dominates modern APIs and configuration files.

Comparisons

JSON vs XML: which should you use?

Compare readability, verbosity, tooling, schema support and performance between JSON and XML in modern systems.

Developer 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.