Free Online JSON to C# Converter
A JSON to C# converter reads a JSON payload and writes the equivalent C# class file you would otherwise type by hand.
Most of the time, when you open a JSON to C# converter, the JSON is already there but the project will not compile until a matching class exists. You might be wiring up a vendor API and need a DTO, or pulling a microservice off dynamic JObject and need real types. Either way, the job is the same: get a class file that lines up with the payload so the build passes.
Our JSON to C# Converter picks up every nested object in the payload, writes a separate class for each one, and infers the property types from the actual values. The output usually compiles on the first try.
How to Convert JSON to C# with Our Converter
- Bring the JSON in: paste it into the editor on the left, drag a .json file onto the input pane, or click Upload File in the toolbar.
- Pick the target language from the sidebar: C# Classes for the standard POJO shape, C# Records for immutable types, or TypeScript, Python, Java, and Go when the project is not .NET.
- Set the namespace and root class from the Settings panel: rename the top-level type, set the namespace, and toggle PascalCase property names.
- Take the code out: Copy puts the class file on your clipboard, Download saves it with the right extension for the language you picked.
Features of the JSON to C# Converter by AIFreeForever
Inferred Property Types
Each JSON value maps to the closest C# type so an integer never lands as a string.
C# 9 Record Output
Generate immutable record types with value equality for DTOs.
JsonPropertyName Attributes
When a JSON key differs from the PascalCase name, the attribute is added for you.
Class Structure Map
Audit every detected type and field before copying the code.
Five Extra Languages
TypeScript, Python, Java, and Go sit in the same sidebar.
Namespace and Root Rename
Why Choose AIFreeForever's JSON to C# Converter
| Capability | AIFreeForever | Typical Online Tools |
|---|---|---|
| Target Languages | C# classes, C# records, TypeScript, Python, Java, Go | C# only |
| Record Output | C# 9 positional records with value equality | Not available |
| Class Structure Map | Live tree of every detected class and field | Generated code only |
| Serialization Attributes | JsonPropertyName added when keys diverge | Plain properties only |
| Privacy | Class generation runs locally in your browser tab | JSON uploaded before processing |
Built for Backend Developers, .NET Migrators, and API Consumers
When a vendor sends a new JSON response, our JSON to C# Converter turns it into the class file your project compiles against. One paste gives you typed output with correct property names, so the build passes without you fixing types by hand.
Most accurate way to turn a JSON response into C# you can compile
Every nested object in the payload gets its own class before the file is written. A field two branches deep comes out with correct property types and a matching JsonPropertyName attribute, so the round trip serializes without a hand fix.
Types From Real Values
Property types come from the actual data values, so the class compiles on the first paste.
Records and Classes
Switch between classes and C# 9 records from one toggle so the output matches the style your codebase already uses.
Stays on Your Machine
Class generation happens in your browser so a vendor response with sensitive fields never leaves the machine.
