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Free Online JSON to C# Class Generator

Generate C# classes from JSON instantly. Supports nested objects and JSON.NET attributes.

JSON Input
C# Output
Generated classes
Options

How to Convert JSON to C# Classes

Our JSON to C# converter analyzes your JSON structure and generates properly typed C# classes. It automatically creates properties with getters and setters, handles nested objects, and supports JSON.NET serialization attributes.

JSON.NET Compatibility

Enable JsonProperty attributes to generate classes fully compatible with Newtonsoft.Json. The generated code includes proper using statements and can be dropped directly into your .NET project.

Local processing

Conversion does not send the JSON to a SimpleTaskTools endpoint. The generated classes are a draft; review nullability, numeric types, naming, and serializer attributes before use.

Frequently Asked Questions

Common questions about JSON to C# Converter.

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What this tool does

Draft C# classes from the shapes and values in sample JSON.

How to use it

Paste a representative object, choose a root class name, and review nullable and attribute options.

Worked example

{"active":true} implies a bool property named Active.

Limitations and checks

Inference from the first array item can miss later variants. Review identifiers and number ranges, then compile. Newtonsoft.Json attributes are not System.Text.Json attributes.

How your data is processed

The operation runs in your browser. Copy and download actions use your device. Where Save work is offered, a local copy is stored; eligible work can sync only under your enabled account settings. See Privacy for site analytics and storage details.

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