JSON to Kotlin Class

Tool Introduction

The "JSON to Kotlin Class" tool is an online conversion tool designed specifically for Kotlin developers. It can intelligently parse complex JSON strings and automatically generate data class code that complies with Kotlin syntax. Whether dealing with simple JSON objects or multi-level nested JSON structures, this tool can quickly and accurately create corresponding Kotlin data models, greatly simplifying the workload of manually writing data classes, helping developers save time and improve development efficiency.

How to Use

1. Open the "JSON to Kotlin Class" tool page.
2. In the "JSON String" input box on the left, paste the JSON data you need to convert.
3. The tool will parse the JSON structure in real-time or automatically after you paste it, and display the generated Kotlin data class code in the "Converted Class" output box on the right.
4. You can directly copy the code from the "Converted Class" area and paste it into your Kotlin project for use.

Input Parameter Format and Requirements:

• JSON String: Must be a valid string conforming to JSON specifications. The tool supports parsing single-level or multi-level nested JSON objects and JSON arrays. Please ensure your JSON format is correct, otherwise it may lead to parsing failure or generation of incorrect Kotlin code.

Output Result Format:

• Converted Class: The output result is data class code written in Kotlin. Each JSON object will correspond to a Kotlin data class, and JSON fields will be intelligently converted into class properties, with appropriate Kotlin data types automatically inferred (such as String, Int, Boolean, List<T>, or custom data classes, etc.).

Frequently Asked Questions

• Q: What input formats are supported?
• A: This tool currently only supports standard JSON strings as input, i.e., text conforming to the ECMA-404 JSON data interchange format.
• Q: What is the format of the output result?
• A: The output result is data class code that complies with Kotlin language syntax.
• Q: How are nested JSON objects and arrays handled?
• A: The tool intelligently parses the hierarchical structure of JSON and automatically generates independent Kotlin data classes for nested JSON objects, while converting JSON arrays into corresponding Kotlin List<T> types.
• Q: Does the generated Kotlin code include serialization/deserialization annotations?
• A: This tool primarily focuses on generating basic Kotlin data class structures. If annotations for specific serialization libraries (such as kotlinx.serialization or Gson) are needed, users may need to add them manually.
• Q: Can I customize the generated class names?
• A: Currently, the tool automatically generates default class names (such as Root, Address, etc.) based on the JSON structure. Advanced custom class name functionality may be provided in future versions.

Notes

• Input Data Format: Please ensure that the input JSON string is valid and correctly formatted. Invalid JSON may lead to conversion failure, generation of incorrect Kotlin code, or partial data loss. It is recommended to use a JSON validation tool before conversion.
• Data Type Inference: The tool will try its best to infer the best Kotlin data type for JSON fields. However, for some special cases or fields with unclear types (for example, the same field is sometimes a number and sometimes a string), the tool may choose a general type, and you may need to manually adjust it according to actual business logic.
• Class Name Renaming: Default generated class names (such as Root, Item, etc.) are automatically generated based on the JSON structure. To improve code readability and project consistency, it is recommended that users rename the generated class names according to actual business needs.
• Performance Considerations: Converting very large or deeply nested JSON files may consume more computing resources and time. For extremely large JSON, it is recommended to process in batches or optimize the JSON structure to improve conversion efficiency.