JSON to Java POJO converter tool icon
Data & JSON tools

JSON to Java POJO converter

Infer Java POJO field types from sample JSON and generate class definitions with support for List<T>/arrays, optional @JsonProperty annotations and nested static classes. Ideal for quickly scaffolding backend models.

JSON input
Notes: this tool generates lightweight POJOs (public fields with optional nested static classes). Mixed types are downgraded to Object and everything runs locally in your browser.
Java output

Usage & Instructions

1. Paste your JSON data into the "JSON Input" box (object or array). 2. Set the "Root type name" (default: AutoGenerated). 3. Select the Array type (List<T> or T[]) and whether to use @JsonProperty annotations. 4. The Java POJO code is automatically generated on the right for you to copy.

Tips

**Local Processing** All parsing and code generation run in your browser. No data is uploaded, ensuring privacy.

**Type Inference** The tool automatically infers field types (String, Integer, Double, Boolean, List, etc.). Null values default to Object.

**Nested Classes** If the JSON contains nested objects, the tool automatically generates static inner classes, making it easy to manage all related classes in one file.

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