JSON to C Converter
Convert JSON to C structs for C development
JSON Input
C Output
What is JSON to C Converter?
Need to generate C structs from your JSON (JavaScript Object Notation) data? This tool does that instantly. Perfect for C developers working with embedded systems, system programming, or low-level applications who need to deserialize JSON into C structures. Generate structs, type definitions, and parsing code automatically.
According to C reference documentation, structs are essential for data organization in C. Our converter analyzes your JSON structure and generates proper C structs. First, validate your JSON using our JSON Validator, then convert it to C. You can also format your JSON with our JSON Formatter first if needed.
Everything happens in your browser – your JSON never leaves your computer. Convert, download, and use your C structs right away.
What Makes This Tool Different
Automatic Struct Generation
We analyze your JSON structure and automatically generate C structs. JSON objects become structs, arrays become arrays, everything gets proper C types.
Type Detection
Automatically detects C types: char arrays for strings, int for numbers, pointers for nested structures. Arrays become fixed-size arrays or pointers.
Header File Support
Generate proper C header files with include guards and forward declarations. Ready to use in your C projects immediately.
File Upload Support
Got a big file? Just upload it. Works great for converting those massive JSON configs or data files without copy-pasting.
Download C File
One click to download your C header file. Drop it into your C project and start using it. Perfect for embedded systems or system programming.
Clean Code Output
The generated C code is clean and well-formatted. Structs are properly named, members are typed correctly, and the code follows C conventions.
How It Works
Paste or Upload JSON
Paste your JSON into the left editor, or click "Upload" to load a file. The JSON should be valid – use our JSON Validator first if you're not sure. You can also click "Sample" to see an example.
Configure Options
Set your struct name. These settings customize the generated C code to match your project's conventions.
Download or Copy
Click "Download" to save the C file, or "Copy" to copy it to your clipboard. The C code is ready to use in your project. Drop it into your C project and start using it.
When You'd Actually Use This
Embedded Systems
Generate C structs from JSON configs for embedded systems. Create data structures for JSON-based configurations or device settings. Perfect for microcontroller programming.
System Programming
Create C structs from JSON data for system-level applications. Generate data models for JSON-based APIs or configurations. Perfect for low-level C programming.
Legacy Code Integration
Generate C structs from JSON data for legacy C applications. Create data models for JSON-based integrations or configurations. Perfect for maintaining legacy systems.
Code Generation
Generate C code from JSON data structures. Perfect for creating data models, configuration structs, or data definitions from JSON schemas.
Common Questions
Is my JSON data stored?
Nope. Everything happens right in your browser. Your JSON never leaves your computer – we don't even see it.
How are JSON objects handled?
JSON objects become C structs. Properties become struct members, and nested objects become nested structs or pointers. Arrays become fixed-size arrays or pointers.
Can I use the generated C code?
Yes. The generated C code is valid and ready to use. Drop it into your C project and start using it. You may want to review and refine the structs for your specific use case.
What about memory management?
The generated structs are basic C structures. You'll need to handle memory allocation and deallocation yourself, as is standard in C programming.
Does it work with large JSON files?
Yep. Since everything happens in your browser, it depends on your device. Small to medium JSON structures convert instantly. Really huge structures might take a few seconds.
What C standard is supported?
The generated code works with C99 and later. It uses standard C features and follows C conventions for maximum compatibility.
Other JSON Tools You Might Need
Conversion is just one JSON task. Here are other tools that work well together:
Need to learn more about JSON? Check out the official JSON.org website or the comprehensive guide on MDN. For C, check out the C reference.