JSON to C# Classes
Convert JSON into C# class definitions with strongly-typed properties. Supports nested objects and arrays. Works entirely in your browser.
Input
Paste JSONOutput
C# classesFrequently Asked Questions
- No. All conversion happens entirely in your browser using JavaScript. Your data never leaves your device.
- Objects become C# classes, strings map to
string, numbers toint/double, booleans tobool, and arrays toList<T>. Nested objects generate separate classes. - Yes. Enter a name in the Root class field before converting. It defaults to
RootClass. - Yes. Click the Copy Output button below the panes to copy the generated C# code to your clipboard.
- Yes. Once the page is loaded, all conversion runs client-side — no network requests are made.
Use Cases
Convert JSON payloads from REST APIs into strongly typed C# classes for .NET applications.
Generate POCO models from external JSON schemas without writing repetitive boilerplate by hand.
Map third-party service responses to internal domain objects quickly and consistently.
Speed up integration testing by producing C# classes that match JSON fixtures exactly.
Maintain type safety across service boundaries in large enterprise codebases.
Developers use this converter to keep request and response models in sync with backend contracts, reducing drift between JSON schemas and C# domain layers.
How to Use JSON to C# Classes
- Paste your JSON input into the editor or upload a .json file.
- Set the namespace and class name for the generated C# output.
- Pick a property naming convention such as PascalCase or camelCase.
- Click Generate to produce the C# class definitions.
- Copy the result or download it as a .cs file for your project.
JSON to C# Classes is a developer tool that turns raw JSON structures into clean, compile-ready C# classes in seconds. Instead of manually declaring properties, types, and constructors, you paste a JSON object and receive matching C# code with correct data types, nullable annotations, and access modifiers.
Every JSON value type maps to a sensible C# equivalent: strings become string, numbers become int or double, booleans become bool, arrays become collections, and nested objects become nested classes. This eliminates guesswork and reduces the risk of runtime casting errors when deserializing API responses.
The generator handles nested objects, arrays, and optional fields automatically, so complex payloads from modern web services convert without manual refactoring. Generated classes work with System.Text.Json, Newtonsoft.Json, and Entity Framework out of the box.
Use it during API integration, code generation, data migration, or legacy system modernization. It fits directly into .NET workflows and saves hours of repetitive modeling work across teams.
Because the output is plain C# code, you can edit class names, add validation attributes, or adjust accessibility before compiling.
Whether you are building a microservice, a desktop application, or a mobile backend, converting JSON to C# classes accelerates delivery and improves code quality across every layer of the stack.
Start with valid JSON, review the generated namespaces and property types, then drop the output into your Visual Studio solution. Strong typing begins with a single paste.