Code Generators

Free Online Data to Class Generators

Generate typed classes and models from JSON or XML for Java, Python, TypeScript, C#, Go, Rust, Swift, Kotlin, Dart, and Ruby. All 36 tools run client-side.

From JSON

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JSON to Javaarrow_forward

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JSON to Pythonarrow_forward

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JSON to TypeScriptarrow_forward

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JSON to C#arrow_forward

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JSON to Goarrow_forward

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JSON to Rustarrow_forward

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JSON to Swiftarrow_forward

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JSON to Kotlinarrow_forward

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JSON to Dartarrow_forward

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JSON to Rubyarrow_forward

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JSON to Objective-Carrow_forward

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JSON to JSON Schemaarrow_forward

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JSON to C++arrow_forward

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JSON to Crystalarrow_forward

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JSON to PropTypesarrow_forward

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JSON to Flowarrow_forward

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JSON to Elmarrow_forward

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JSON to Pikearrow_forward

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JSON to Haskellarrow_forward

From XML

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XML to Javaarrow_forward

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XML to Pythonarrow_forward

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XML to TypeScriptarrow_forward

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XML to C#arrow_forward

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XML to Goarrow_forward

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XML to Rustarrow_forward

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XML to Swiftarrow_forward

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XML to Kotlinarrow_forward

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XML to Objective-Carrow_forward

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XML to JSON Schemaarrow_forward

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XML to C++arrow_forward

code

XML to Crystalarrow_forward

code

XML to PropTypesarrow_forward

code

XML to Flowarrow_forward

code

XML to Elmarrow_forward

code

XML to Pikearrow_forward

code

XML to Haskellarrow_forward

What Are Data to Class Generators?

Data to Class generators analyse a sample JSON or XML payload and automatically produce typed data model classes — such as POJOs for Java, dataclasses for Python, interfaces for TypeScript, or structs for Go and Rust. This eliminates the tedious, error-prone work of manually writing boilerplate model code.

Paste your sample data, choose a language, and get production-ready typed classes in seconds — all in your browser with no uploads or accounts required.

Common Use Cases

check_circleGenerate Java POJOs from a JSON API response for Spring Boot
check_circleCreate TypeScript interfaces from a REST API payload
check_circleGenerate Python dataclasses from a JSON config schema
check_circleProduce C# model classes for .NET deserialization
check_circleGenerate Go structs for JSON unmarshalling
check_circleCreate Kotlin data classes for Android API integration
check_circleGenerate Rust structs with Serde annotations from JSON

Frequently Asked Questions

Which languages are supported for code generation?

We support Java, Python, TypeScript, C# (.NET), Go, Rust, Swift, Kotlin, Dart, and Ruby from JSON, and Java, Python, TypeScript, C#, Go, Rust, Swift, and Kotlin from XML.

How accurate is the generated code?

Generators infer types from your sample data. They handle nested objects, arrays, and primitive types well. Optional fields or nullable types may need manual review, especially for edge cases not present in the sample.

Can I use the generated classes directly in production?

The generated code is a solid starting point. For production use, review field names, nullability, and add any required annotations (e.g. @JsonProperty for Java or Serde attributes for Rust).

Does it handle nested objects and arrays?

Yes. The generators recursively process nested objects and arrays, creating separate inner classes or interfaces as needed to represent the full data hierarchy.

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