C++ Model Generator

Transform JSON data into production-ready C++ classes with automatic member generation, STL containers, smart pointers, and modern C++17/20 syntax. Features intelligent type inference, nested class handling, const correctness, and RAII patterns. Perfect for C++ developers working with APIs and data structures.
STL Containers Smart Pointers Header/Source Split Modern C++ Syntax
Quick Examples 
CLASS: class User { ... };
SMART: std::unique_ptr<User> user;
VECTOR: std::vector<std::string> tags;
JSON Input
Enter JSON to validate
Model Configuration
Name for the main C++ class
Advanced Options
Generated C++ Code
Ready to generate models Header | 0 models
Model Analysis
0
Members
0
Optional
0
Nested
0
Containers
C++ Types Used:
Quick Actions

Help & Related Tools

Everything you need to know

FAQ Frequently Asked Questions

What C++ features does the Model Generator support?
Generate modern C++ models with STL containers, smart pointers, std::optional, RAII patterns, const correctness, and C++11/14/17/20 syntax. Includes header/source separation, Doxygen comments, and JSON serialization with nlohmann/json library.
How do I convert JSON to C++ classes?
Paste JSON data, configure C++ standard and options, then click "Generate Models". Choose between header-only or header+source files. The tool creates production-ready C++ classes with proper constructors, getters/setters, and modern C++ features.
Does the tool support different C++ standards?
Yes, supports C++11, C++14, C++17, and C++20 with appropriate feature usage. Modern features like std::optional (C++17+), smart pointers, and STL containers are automatically configured based on your selected standard.
Are there any limitations for complex JSON structures?
The tool handles nested objects, arrays, and complex data structures efficiently. Very large JSON files (over 10MB) may affect performance. Generated code follows modern C++ best practices with RAII and const correctness.
Can I customize the generated C++ code output?
Absolutely! Configure C++ standard, output format (header-only vs header+source), namespace, smart pointers, constructors, getters/setters, operators, Doxygen documentation, and JSON serialization. Full control over modern C++ features.

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